diff --git a/unittests/records.xml b/unittests/records.xml
index 635f22bb5e185fdf7844b2d5c26ba0fc68b83d8c..92e929172a7cd568c375aeb2a6fc9ba9f7b1c237 100644
--- a/unittests/records.xml
+++ b/unittests/records.xml
@@ -1,168 +1,162 @@
 <Entities>
-  <Record id="109">
-    <Version id="f83969a8655440054a322e9d371bce728c030f40" head="true"/>
-    <Parent id="100" name="Person"/>
-    <Property id="101" name="first_name" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
-    <Property id="102" name="last_name" datatype="TEXT" importance="FIX" flag="inheritance:FIX">AuthorA</Property>
-  </Record>
-  <Record id="110">
-    <Version id="698791344c26b48101c23a2c07746a79039c8266" head="true"/>
-    <Parent id="103" name="Project"/>
-    <Property id="104" name="date" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020</Property>
-    <Property id="105" name="identifier" datatype="TEXT" importance="FIX" flag="inheritance:FIX">SpeedOfLight</Property>
-  </Record>
-  <Record id="111">
-    <Version id="7a52266b776ad26c471e21ed05d0d2e397526d27" head="true"/>
-    <Parent id="100" name="Person"/>
-    <Property id="101" name="first_name" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
-    <Property id="102" name="last_name" datatype="TEXT" importance="FIX" flag="inheritance:FIX">AuthorD</Property>
-  </Record>
-  <Record id="112">
-    <Version id="7753ede1808e20fc958f0a113dd1ec3fef7fca13" head="true"/>
-    <Parent id="103" name="Project"/>
-    <Property id="104" name="date" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020</Property>
-    <Property id="105" name="identifier" datatype="TEXT" importance="FIX" flag="inheritance:FIX">climate-model-predict</Property>
-  </Record>
-  <Record id="113">
-    <Version id="3a49980c61ad722f3e827cf822bc37d9246cfe54" head="true"/>
-    <Parent id="100" name="Person"/>
-    <Property id="101" name="first_name" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
-    <Property id="102" name="last_name" datatype="TEXT" importance="FIX" flag="inheritance:FIX">AuthorB</Property>
-  </Record>
-  <Record id="114">
-    <Version id="f59a362efab99d729c7365af27447579ff676b1a" head="true"/>
-    <Parent id="100" name="Person"/>
-    <Property id="101" name="first_name" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
-    <Property id="102" name="last_name" datatype="TEXT" importance="FIX" flag="inheritance:FIX">AuthorC</Property>
-  </Record>
-  <Record id="115">
-    <Version id="a4137cf9d2c48991aa51abba59dffdabfeb366d7" head="true"/>
-    <Parent id="100" name="Person"/>
-    <Property id="101" name="first_name" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
-    <Property id="102" name="last_name" datatype="TEXT" importance="FIX" flag="inheritance:FIX">AuthorE</Property>
-  </Record>
-  <Record id="116">
-    <Version id="790f5e3b165816448cd7221f1170f91781da9d25" head="true"/>
-    <Parent id="106" name="Measurement"/>
-    <Property id="104" name="date" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020-01-04</Property>
-    <Property id="105" name="identifier" datatype="TEXT" importance="FIX" flag="inheritance:FIX">average-all-exp</Property>
-    <Property id="103" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">110</Property>
-    <Property id="107" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
-      <Value>109</Value>
+  <Record id="102">
+    <Version id="63e3fffa8ad0ea5f900641f562f905991e149f33" head="true"/>
+    <Parent id="101" name="PyTestInfo"/>
+    <Property id="100" name="TestIdentification" description="This is a unique key which should be only known to the pytest file that is used to run tests within this instance of CaosDB." datatype="TEXT" importance="FIX" flag="inheritance:FIX">10b128cf8a1372f30aa3697466bb55e76974e0c16a599bb44ace88f19c8f61e2</Property>
+  </Record>
+  <Record id="1925">
+    <Version id="de5397f924bbc12b626c180a479879e0ae28bb9a" head="true"/>
+    <Parent id="1894" name="Project"/>
+    <Property id="1891" name="date" description="date of the experiment" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020</Property>
+    <Property id="1892" name="identifier" description="identifier of the experiment" datatype="TEXT" importance="FIX" flag="inheritance:FIX">climate-model-predict</Property>
+  </Record>
+  <Record id="1926">
+    <Version id="6ff43bec3fe5a3735d0f28cef0f5659a2a56662d" head="true"/>
+    <Parent id="1903" name="Person"/>
+    <Property id="1905" name="first_name" description="First name of a Person." datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
+    <Property id="1906" name="last_name" description="LastName of a Person." datatype="TEXT" importance="FIX" flag="inheritance:FIX">AuthorE</Property>
+  </Record>
+  <Record id="1927">
+    <Version id="890b800ab4a548693db85b3cc32688b8936225bc" head="true"/>
+    <Parent id="1903" name="Person"/>
+    <Property id="1905" name="first_name" description="First name of a Person." datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
+    <Property id="1906" name="last_name" description="LastName of a Person." datatype="TEXT" importance="FIX" flag="inheritance:FIX">AuthorD</Property>
+  </Record>
+  <Record id="1928">
+    <Version id="fc8b7d2b9b0652952f315de3d8db6c742c4b01ab" head="true"/>
+    <Parent id="1894" name="Project"/>
+    <Property id="1891" name="date" description="date of the experiment" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020</Property>
+    <Property id="1892" name="identifier" description="identifier of the experiment" datatype="TEXT" importance="FIX" flag="inheritance:FIX">SpeedOfLight</Property>
+  </Record>
+  <Record id="1929">
+    <Version id="0989aa810e77f0fc9de9d5ca7144a50360fb2708" head="true"/>
+    <Parent id="1903" name="Person"/>
+    <Property id="1905" name="first_name" description="First name of a Person." datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
+    <Property id="1906" name="last_name" description="LastName of a Person." datatype="TEXT" importance="FIX" flag="inheritance:FIX">AuthorB</Property>
+  </Record>
+  <Record id="1930">
+    <Version id="102d7f660f7794409909781afd4dfe76a89e54bd" head="true"/>
+    <Parent id="1903" name="Person"/>
+    <Property id="1905" name="first_name" description="First name of a Person." datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
+    <Property id="1906" name="last_name" description="LastName of a Person." datatype="TEXT" importance="FIX" flag="inheritance:FIX">AuthorA</Property>
+  </Record>
+  <Record id="1931">
+    <Version id="e1c9b59366695c1fb0bd299556d5cefe8e83050a" head="true"/>
+    <Parent id="1903" name="Person"/>
+    <Property id="1905" name="first_name" description="First name of a Person." datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
+    <Property id="1906" name="last_name" description="LastName of a Person." datatype="TEXT" importance="FIX" flag="inheritance:FIX">AuthorC</Property>
+  </Record>
+  <Record id="1932" description="Code for fitting the predictive model to the training data and for predicting the average annual temperature for all measurement stations for the years 2010 to 2019">
+    <Version id="46168990443c22bc5cee14a56fdc6500f8402f89" head="true"/>
+    <Parent id="1922" name="Measurement"/>
+    <Property id="1891" name="date" description="date of the experiment" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020-02-01</Property>
+    <Property id="1892" name="identifier" description="identifier of the experiment" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
+    <Property id="1894" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">1925</Property>
+    <Property id="1893" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
+      <Value>1926</Value>
     </Property>
-    <Property id="24" name="description" description="Description of an entity." datatype="TEXT" importance="FIX" flag="inheritance:FIX">Average over all data of each type of experiment separately and comined.</Property>
-  </Record>
-  <Record id="118">
-    <Version id="520e3e1ab113002c26051652e169f4e2c3273cea" head="true"/>
-    <Parent id="106" name="Measurement"/>
-    <Property id="104" name="date" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020-01-05</Property>
-    <Property id="105" name="identifier" datatype="TEXT" importance="FIX" flag="inheritance:FIX">average-all-exp-corr</Property>
-    <Property id="103" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">110</Property>
-    <Property id="107" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
-      <Value>109</Value>
+  </Record>
+  <Record id="1933" description="Average temperatures of the years 2010-2019 as obtained from wheatherdata.example">
+    <Version id="5bc541bc3b51ded8b6c0566473dec9e4e7d2b0c4" head="true"/>
+    <Parent id="1922" name="Measurement"/>
+    <Property id="1891" name="date" description="date of the experiment" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2010-01-01</Property>
+    <Property id="1892" name="identifier" description="identifier of the experiment" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
+    <Property id="1894" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">1925</Property>
+    <Property id="1893" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
+      <Value>1927</Value>
     </Property>
-    <Property id="24" name="description" description="Description of an entity." datatype="TEXT" importance="FIX" flag="inheritance:FIX">Average over all data of each type of experiment separately and comined.</Property>
-  </Record>
-  <Record id="119">
-    <Version id="3383403dc3080d1b566b3b39063d61c110260cb0" head="true"/>
-    <Parent id="106" name="Measurement"/>
-    <Property id="104" name="date" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020-02-08</Property>
-    <Property id="105" name="identifier" datatype="TEXT" importance="FIX" flag="inheritance:FIX">prediction-errors</Property>
-    <Property id="103" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">112</Property>
-    <Property id="107" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
-      <Value>111</Value>
+  </Record>
+  <Record id="1934" description="Average temperatures of the years 2000-2009 as obtained from wheatherdata.example">
+    <Version id="b3800de97be1879721f2e3f0d1ae82434b7d696b" head="true"/>
+    <Parent id="1922" name="Measurement"/>
+    <Property id="1891" name="date" description="date of the experiment" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2000-01-01</Property>
+    <Property id="1892" name="identifier" description="identifier of the experiment" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
+    <Property id="1894" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">1925</Property>
+    <Property id="1893" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
+      <Value>1927</Value>
     </Property>
-    <Property id="24" name="description" description="Description of an entity." datatype="TEXT" importance="FIX" flag="inheritance:FIX">comparison between predicted and measured temperatures for 2010 to 2019</Property>
-  </Record>
-  <Record id="120">
-    <Version id="5da5ef24abcdec5be0f24fb9977f4c574d463768" head="true"/>
-    <Parent id="106" name="Measurement"/>
-    <Property id="104" name="date" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020-01-01</Property>
-    <Property id="105" name="identifier" datatype="TEXT" importance="FIX" flag="inheritance:FIX">TimeOfFlight</Property>
-    <Property id="103" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">110</Property>
-    <Property id="107" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
-      <Value>109</Value>
-      <Value>113</Value>
+  </Record>
+  <Record id="1935" description="Average temperatures of the years 1990-1999 as obtained from wheatherdata.example">
+    <Version id="66ee07e66b4967e0019407521c301eede2004c7c" head="true"/>
+    <Parent id="1922" name="Measurement"/>
+    <Property id="1891" name="date" description="date of the experiment" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">1990-01-01</Property>
+    <Property id="1892" name="identifier" description="identifier of the experiment" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
+    <Property id="1894" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">1925</Property>
+    <Property id="1893" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
+      <Value>1927</Value>
     </Property>
-    <Property id="24" name="description" description="Description of an entity." datatype="TEXT" importance="FIX" flag="inheritance:FIX">Time-of-flight measurements to determine the speed of light</Property>
-  </Record>
-  <Record id="121">
-    <Version id="7efa963b3663818aee4f9438cbbe26f8565af1e9" head="true"/>
-    <Parent id="106" name="Measurement"/>
-    <Property id="104" name="date" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020-01-02</Property>
-    <Property id="105" name="identifier" datatype="TEXT" importance="FIX" flag="inheritance:FIX">Cavity</Property>
-    <Property id="103" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">110</Property>
-    <Property id="107" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
-      <Value>109</Value>
-      <Value>114</Value>
+  </Record>
+  <Record id="1936" description="Average temperatures of the years 1980-1989 as obtained from wheatherdata.example">
+    <Version id="5fc471a6597618375075544e30c17ad7cbe8c304" head="true"/>
+    <Parent id="1922" name="Measurement"/>
+    <Property id="1891" name="date" description="date of the experiment" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">1980-01-01</Property>
+    <Property id="1892" name="identifier" description="identifier of the experiment" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
+    <Property id="1894" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">1925</Property>
+    <Property id="1893" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
+      <Value>1927</Value>
     </Property>
-    <Property id="24" name="description" description="Description of an entity." datatype="TEXT" importance="FIX" flag="inheritance:FIX">Cavity resonance measurements for determining the speed of light</Property>
-  </Record>
-  <Record id="122">
-    <Version id="244cda0358bc6937ee0944a86a0e0580c7b41781" head="true"/>
-    <Parent id="106" name="Measurement"/>
-    <Property id="104" name="date" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020-01-03</Property>
-    <Property id="105" name="identifier" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
-    <Property id="103" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">110</Property>
-    <Property id="107" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
-      <Value>109</Value>
-      <Value>113</Value>
+  </Record>
+  <Record id="1937" description="Radio interferometry measurements to determine the speed of light">
+    <Version id="ebf4a22cc72686ea12f85fe41bcf40993b4b1471" head="true"/>
+    <Parent id="1922" name="Measurement"/>
+    <Property id="1891" name="date" description="date of the experiment" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020-01-03</Property>
+    <Property id="1892" name="identifier" description="identifier of the experiment" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
+    <Property id="1894" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">1928</Property>
+    <Property id="1893" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
+      <Value>1930</Value>
+      <Value>1929</Value>
     </Property>
-    <Property id="24" name="description" description="Description of an entity." datatype="TEXT" importance="FIX" flag="inheritance:FIX">Radio interferometry measurements to determine the speed of light</Property>
-  </Record>
-  <Record id="123">
-    <Version id="656558b1a926824b98a733c1fdd9d0444c75745f" head="true"/>
-    <Parent id="106" name="Measurement"/>
-    <Property id="104" name="date" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">1980-01-01</Property>
-    <Property id="105" name="identifier" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
-    <Property id="103" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">112</Property>
-    <Property id="107" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
-      <Value>111</Value>
+  </Record>
+  <Record id="1938" description="Cavity resonance measurements for determining the speed of light">
+    <Version id="f72da38d04b8cb066c91978ea9314b15b24e5d41" head="true"/>
+    <Parent id="1922" name="Measurement"/>
+    <Property id="1891" name="date" description="date of the experiment" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020-01-02</Property>
+    <Property id="1892" name="identifier" description="identifier of the experiment" datatype="TEXT" importance="FIX" flag="inheritance:FIX">Cavity</Property>
+    <Property id="1894" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">1928</Property>
+    <Property id="1893" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
+      <Value>1930</Value>
+      <Value>1931</Value>
     </Property>
-    <Property id="24" name="description" description="Description of an entity." datatype="TEXT" importance="FIX" flag="inheritance:FIX">Average temperatures of the years 1980-1989 as obtained from wheatherdata.example</Property>
-  </Record>
-  <Record id="124">
-    <Version id="971900b83171b89787aa26a0a7b543d096ee1ebc" head="true"/>
-    <Parent id="106" name="Measurement"/>
-    <Property id="104" name="date" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">1990-01-01</Property>
-    <Property id="105" name="identifier" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
-    <Property id="103" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">112</Property>
-    <Property id="107" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
-      <Value>111</Value>
+  </Record>
+  <Record id="1939" description="Time-of-flight measurements to determine the speed of light">
+    <Version id="fffe49a77c9bc58c116cdeab20e01a584f464eee" head="true"/>
+    <Parent id="1922" name="Measurement"/>
+    <Property id="1891" name="date" description="date of the experiment" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020-01-01</Property>
+    <Property id="1892" name="identifier" description="identifier of the experiment" datatype="TEXT" importance="FIX" flag="inheritance:FIX">TimeOfFlight</Property>
+    <Property id="1894" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">1928</Property>
+    <Property id="1893" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
+      <Value>1930</Value>
+      <Value>1929</Value>
     </Property>
-    <Property id="24" name="description" description="Description of an entity." datatype="TEXT" importance="FIX" flag="inheritance:FIX">Average temperatures of the years 1990-1999 as obtained from wheatherdata.example</Property>
-  </Record>
-  <Record id="125">
-    <Version id="deeb78862ae1ccdc831532e51bd225976af67807" head="true"/>
-    <Parent id="106" name="Measurement"/>
-    <Property id="104" name="date" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2000-01-01</Property>
-    <Property id="105" name="identifier" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
-    <Property id="103" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">112</Property>
-    <Property id="107" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
-      <Value>111</Value>
+  </Record>
+  <Record id="1940" description="comparison between predicted and measured temperatures for 2010 to 2019">
+    <Version id="51c95e51496aa7fababe609a03537988e67040cc" head="true"/>
+    <Parent id="1922" name="Measurement"/>
+    <Property id="1891" name="date" description="date of the experiment" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020-02-08</Property>
+    <Property id="1892" name="identifier" description="identifier of the experiment" datatype="TEXT" importance="FIX" flag="inheritance:FIX">prediction-errors</Property>
+    <Property id="1894" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">1925</Property>
+    <Property id="1893" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
+      <Value>1927</Value>
     </Property>
-    <Property id="24" name="description" description="Description of an entity." datatype="TEXT" importance="FIX" flag="inheritance:FIX">Average temperatures of the years 2000-2009 as obtained from wheatherdata.example</Property>
-  </Record>
-  <Record id="126">
-    <Version id="133832dd2b528ab4a83a189dc8fca9d1d7c541fa" head="true"/>
-    <Parent id="106" name="Measurement"/>
-    <Property id="104" name="date" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2010-01-01</Property>
-    <Property id="105" name="identifier" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
-    <Property id="103" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">112</Property>
-    <Property id="107" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
-      <Value>111</Value>
+  </Record>
+  <Record id="1941" description="Average over all data of each type of experiment separately and comined.">
+    <Version id="b346051812337c36b642331cb5418029c014252f" head="true"/>
+    <Parent id="1922" name="Measurement"/>
+    <Property id="1891" name="date" description="date of the experiment" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020-01-05</Property>
+    <Property id="1892" name="identifier" description="identifier of the experiment" datatype="TEXT" importance="FIX" flag="inheritance:FIX">average-all-exp-corr</Property>
+    <Property id="1894" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">1928</Property>
+    <Property id="1893" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
+      <Value>1930</Value>
     </Property>
-    <Property id="24" name="description" description="Description of an entity." datatype="TEXT" importance="FIX" flag="inheritance:FIX">Average temperatures of the years 2010-2019 as obtained from wheatherdata.example</Property>
-  </Record>
-  <Record id="127">
-    <Version id="865aebd7662341f8582b4f0b32bd96fd986eb815" head="true"/>
-    <Parent id="106" name="Measurement"/>
-    <Property id="104" name="date" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020-02-01</Property>
-    <Property id="105" name="identifier" datatype="TEXT" importance="FIX" flag="inheritance:FIX"/>
-    <Property id="103" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">112</Property>
-    <Property id="107" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
-      <Value>115</Value>
+  </Record>
+  <Record id="1942" description="Average over all data of each type of experiment separately and comined.">
+    <Version id="8af82cbf3cbb01043badb1c319f91a6dfaa64c8a" head="true"/>
+    <Parent id="1922" name="Measurement"/>
+    <Property id="1891" name="date" description="date of the experiment" datatype="DATETIME" importance="FIX" flag="inheritance:FIX">2020-01-04</Property>
+    <Property id="1892" name="identifier" description="identifier of the experiment" datatype="TEXT" importance="FIX" flag="inheritance:FIX">average-all-exp</Property>
+    <Property id="1894" name="project" datatype="Project" importance="FIX" flag="inheritance:FIX">1928</Property>
+    <Property id="1893" name="responsible" datatype="LIST&lt;Person&gt;" importance="FIX" flag="inheritance:FIX">
+      <Value>1930</Value>
     </Property>
-    <Property id="24" name="description" description="Description of an entity." datatype="TEXT" importance="FIX" flag="inheritance:FIX">Code for fitting the predictive model to the training data and for predicting the average annual temperature for all measurement stations for the years 2010 to 2019</Property>
   </Record>
 </Entities>
diff --git a/unittests/test_tool.py b/unittests/test_tool.py
index 06328deb81a195739a24ccd89581ca955bb03b7f..b71e3ce073c2f98617ac8937efa85409ca62b4fb 100755
--- a/unittests/test_tool.py
+++ b/unittests/test_tool.py
@@ -247,7 +247,6 @@ def test_crawler_update_list(crawler, ident):
     assert len(comp[1]["properties"]) == 0
 
 
-@pytest.mark.xfail
 def test_synchronization(crawler, ident):
     insl, updl = crawler.synchronize(commit_changes=False)
     assert len(insl) == 0