diff --git a/tests/test_entity_versioning.sql b/tests/test_entity_versioning.sql
index de4c6498856b4a9ed80bd195d98e39568c72e246..ad321c2584e24f3ef76c57c5461068efb6e710ea 100644
--- a/tests/test_entity_versioning.sql
+++ b/tests/test_entity_versioning.sql
@@ -34,6 +34,13 @@ CALL tap.no_plan();
 
 -- SETUP
 
+SET @EntityID1 = 10001;
+SET @EntityID2 = 10002;
+SET @EntityID3 = 10003;
+SET @EntityID4 = 10004;
+SET @EntityID5 = 10005;
+SET @EntityID6 = 10006;
+
 -- Disable versioning because we want to test `insert_single_child_version`
 -- separately from `insertEntity` but the former is called inside the latter
 -- when versioning is enabled.
@@ -46,22 +53,22 @@ INSERT INTO transactions (srid,seconds,nanos,username,realm) VALUES
 ("SRIDblieb", 3456, 4576, "you", "home");
 DELETE FROM entities WHERE id > 99;
 CALL entityACL(@ACLID1, "{acl1}");
-CALL insertEntity("EntityName", "EntityDesc", "RECORDTYPE", "{acl1}");
-SELECT entity_id INTO @EntityID FROM name_data WHERE value="EntityName";
+CALL insertEntity(@EntityID1, "EntityName", "EntityDesc", "RECORDTYPE", "{acl1}");
+SELECT entity_id INTO @InternalEntityID FROM name_data WHERE value="EntityName";
 
 
 -- TEST insert_single_child_version
 SELECT count(*) INTO @x FROM entity_version;
 SELECT tap.eq(@x, 0, "no versions there yet");
 
-CALL insert_single_child_version(@EntityID, "hashbla", "versionbla", NULL, "SRIDbla");
+CALL insert_single_child_version(@InternalEntityID, "hashbla", "versionbla", NULL, "SRIDbla");
 SELECT _ipparent INTO @x from entity_version WHERE version="versionbla";
 SELECT tap.eq(@x, NULL, "no parent for the first version");
 
 -- add a second version
 SELECT count(*) INTO @x FROM entity_version;
 SELECT tap.eq(@x, 1, "one version there already");
-CALL insert_single_child_version(@EntityID, "hashblub", "versionblub", "versionbla", "SRIDblub");
+CALL insert_single_child_version(@InternalEntityID, "hashblub", "versionblub", "versionbla", "SRIDblub");
 
 SELECT _ipparent INTO @x from entity_version WHERE version="versionblub";
 SELECT tap.eq(@x, 1, "the original entity is the parent");
@@ -72,7 +79,7 @@ SELECT tap.eq(@x, 2, "two versions there already");
 
 CALL tap._assert_throws(
      concat("CALL insert_single_child_version(",
-            @EntityID, ', "hashblieb", "versionblieb", "non-existing-parent", "SRIDBlieb")'),
+            @InternalEntityID, ', "hashblieb", "versionblieb", "non-existing-parent", "SRIDBlieb")'),
      "non existing parent throws");
 
 SELECT count(*) INTO @x FROM entity_version;
@@ -80,15 +87,15 @@ SELECT tap.eq(@x, 2, "still two versions there");
 
 
 -- TEST get_primary_parent_version
-SELECT tap.eq(get_primary_parent_version(@EntityID, "versionblub"), "versionbla", "returns correct parent for versionblub");
-SELECT tap.eq(get_primary_parent_version(@EntityID, "versionbla"), NULL, "versionbla has no parent");
+SELECT tap.eq(get_primary_parent_version(@EntityID1, "versionblub"), "versionbla", "returns correct parent for versionblub");
+SELECT tap.eq(get_primary_parent_version(@EntityID1, "versionbla"), NULL, "versionbla has no parent");
 
 
 -- TEST delete_all_entity_versions
 SELECT count(*) INTO @x FROM entity_version;
 SELECT tap.ok(@x > 0, "several versions in the table");
 
-CALL delete_all_entity_versions(@EntityID);
+CALL delete_all_entity_versions(@EntityID1);
 SELECT count(*) INTO @x FROM entity_version;
 SELECT tap.eq(@x, 0, "no versions there any more");
 
@@ -109,20 +116,20 @@ SELECT tap.eq(@x, 0, "before insertEntity, no versions there");
 
 -- TEST insertEntity - should produce a version w/o parent
 SET @SRID = "SRIDbla";
-CALL insertEntity("EntityName", "EntityDesc", "RECORDTYPE", "{acl1}");
-SELECT entity_id INTO @EntityID FROM name_data WHERE value="EntityName";
-CALL insertEntity("ParentName", "ParentDesc", "RECORDTYPE", "{acl1}");
+CALL insertEntity(@EntityID2, "EntityName", "EntityDesc", "RECORDTYPE", "{acl1}");
+SELECT entity_id INTO @InternalEntityID FROM name_data WHERE value="EntityName";
+CALL insertEntity(@EntityID3, "ParentName", "ParentDesc", "RECORDTYPE", "{acl1}");
 SELECT entity_id INTO @ParentID FROM name_data WHERE value="ParentName";
-CALL insertIsa(@EntityID, @ParentID);
-CALL insertEntityProperty(0, @EntityID, 17, "null_data", NULL, NULL,
+CALL insertIsa(@EntityID2, @EntityID3);
+CALL insertEntityProperty(0, @EntityID2, 17, "null_data", NULL, NULL,
     "RECOMMENDED", NULL, "DescOverride", NULL, NULL, 0);
 
-SELECT count(*) INTO @x FROM entity_version WHERE entity_id = @EntityID;
+SELECT count(*) INTO @x FROM entity_version WHERE entity_id = @InternalEntityID;
 SELECT tap.eq(@x, 1, "after insertEntity, a version is there.");
-SELECT _iversion INTO @x FROM entity_version WHERE entity_id = @EntityID and _ipparent is NULL;
+SELECT _iversion INTO @x FROM entity_version WHERE entity_id = @InternalEntityID and _ipparent is NULL;
 SELECT tap.eq(@x, 1, "after insertEntity, the _iversion number is 1.");
 
-SELECT _ipparent INTO @x from entity_version WHERE entity_id = @EntityID;
+SELECT _ipparent INTO @x from entity_version WHERE entity_id = @InternalEntityID;
 SELECT tap.eq(@x, NULL, "no parent for the freshly inserted entity");
 SELECT tap.eq(count(*), 0, "no entity in archive_entities before first update")
     FROM archive_entities;
@@ -130,14 +137,14 @@ SELECT tap.eq(count(*), 0, "no entity in archive_entities before first update")
 
 -- TEST updateEntity - should produce a version with a parent
 SET @SRID = "SRIDblub";
-CALL deleteEntityProperties(@EntityID);
-CALL updateEntity(@EntityID, "NewEntityName", "NewEntityDesc", "RECORD", NULL, NULL, "{acl1}");
-SELECT count(*) INTO @x FROM entity_version WHERE entity_id = @EntityID;
+CALL deleteEntityProperties(@EntityID2);
+CALL updateEntity(@EntityID2, "NewEntityName", "NewEntityDesc", "RECORD", NULL, NULL, "{acl1}");
+SELECT count(*) INTO @x FROM entity_version WHERE entity_id = @InternalEntityID;
 SELECT tap.eq(@x, 2, "after updateEntity, a second version is there.");
 
-SELECT _iversion INTO @x FROM entity_version WHERE entity_id = @EntityID and _ipparent = 1;
+SELECT _iversion INTO @x FROM entity_version WHERE entity_id = @InternalEntityID and _ipparent = 1;
 SELECT tap.eq(@x, 2, "after updateEntity, the _iversion number incremented.");
-SELECT _ipparent INTO @x FROM entity_version WHERE entity_id = @EntityID and _ipparent = 1;
+SELECT _ipparent INTO @x FROM entity_version WHERE entity_id = @InternalEntityID and _ipparent = 1;
 SELECT tap.eq(@x, 1, "after updateEntity, the _pparent points to the first version");
 
 SELECT tap.eq(count(*), 1, "after updateEntity, one entity in archive_entities")
@@ -145,60 +152,60 @@ SELECT tap.eq(count(*), 1, "after updateEntity, one entity in archive_entities")
 
 
 -- TEST get_version_history
-CALL get_version_history(@EntityID);
+CALL get_version_history(@EntityID2);
 
 -- TEST retrieveEntity
 
 SELECT version INTO @x FROM entity_version
-    WHERE entity_id = @EntityID
+    WHERE entity_id = @InternalEntityID
     AND _iversion = 2;
-CALL retrieveEntity(@EntityID, NULL);
-CALL retrieveEntity(@EntityID, "non-existing-version");
-CALL retrieveEntity(@EntityID, get_head_version(@EntityID));
-CALL retrieveEntity(@EntityID, @x);
+CALL retrieveEntity(@EntityID2, NULL);
+CALL retrieveEntity(@EntityID2, "non-existing-version");
+CALL retrieveEntity(@EntityID2, get_head_version(@EntityID2));
+CALL retrieveEntity(@EntityID2, @x);
 
 -- TEST retrieveEntityParents
 
-CALL retrieveEntityParents(@EntityID, NULL);
-CALL retrieveEntityParents(@EntityID, "non-existing-version");
-CALL retrieveEntityParents(@EntityID, get_head_version(@EntityID));
-CALL retrieveEntityParents(@EntityID, @x);
+CALL retrieveEntityParents(@EntityID2, NULL);
+CALL retrieveEntityParents(@EntityID2, "non-existing-version");
+CALL retrieveEntityParents(@EntityID2, get_head_version(@EntityID2));
+CALL retrieveEntityParents(@EntityID2, @x);
 
 -- TEST retrieveEntityProperties
 
-CALL retrieveEntityProperties(0, @EntityID, NULL);
-CALL retrieveEntityProperties(0, @EntityID, "non-existing-version");
-CALL retrieveEntityProperties(0, @EntityID, get_head_version(@EntityID));
-CALL retrieveEntityProperties(0, @EntityID, @x);
+CALL retrieveEntityProperties(0, @EntityID2, NULL);
+CALL retrieveEntityProperties(0, @EntityID2, "non-existing-version");
+CALL retrieveEntityProperties(0, @EntityID2, get_head_version(@EntityID2));
+CALL retrieveEntityProperties(0, @EntityID2, @x);
 
 -- TEST retrieveOverrides
 
-CALL retrieveOverrides(0, @EntityID, NULL);
-CALL retrieveOverrides(0, @EntityID, "non-existing-version");
-CALL retrieveOverrides(0, @EntityID, get_head_version(@EntityID));
-CALL retrieveOverrides(0, @EntityID, @x);
+CALL retrieveOverrides(0, @EntityID2, NULL);
+CALL retrieveOverrides(0, @EntityID2, "non-existing-version");
+CALL retrieveOverrides(0, @EntityID2, get_head_version(@EntityID2));
+CALL retrieveOverrides(0, @EntityID2, @x);
 
 
 -- and 2nd updateEntity
 SET @SRID = "SRIDblieb";
-CALL updateEntity(@EntityID, "EntityName", "EntityDesc", "RECORDTYPE", NULL, NULL, "{acl1}");
-SELECT count(*) INTO @x FROM entity_version WHERE entity_id = @EntityID;
+CALL updateEntity(@EntityID2, "EntityName", "EntityDesc", "RECORDTYPE", NULL, NULL, "{acl1}");
+SELECT count(*) INTO @x FROM entity_version WHERE entity_id = @InternalEntityID;
 SELECT tap.eq(@x, 3, "after 2nd updateEntity, a 3rd version is there.");
 
-SELECT _iversion INTO @x FROM entity_version WHERE entity_id = @EntityID and _ipparent = 2;
+SELECT _iversion INTO @x FROM entity_version WHERE entity_id = @InternalEntityID and _ipparent = 2;
 SELECT tap.eq(@x, 3, "after 2nd updateEntity, the _iversion number incremented again.");
-SELECT _ipparent INTO @x FROM entity_version WHERE entity_id = @EntityID and _iversion = 3;
+SELECT _ipparent INTO @x FROM entity_version WHERE entity_id = @InternalEntityID and _iversion = 3;
 SELECT tap.eq(@x, 2, "after 2nd updateEntity, the _pparent points to the 2nd version");
-SELECT tap.eq("SRIDblieb", srid, "correct transaction was stored") FROM entity_version WHERE entity_id = @EntityID AND _ipparent = 2;
+SELECT tap.eq("SRIDblieb", srid, "correct transaction was stored") FROM entity_version WHERE entity_id = @InternalEntityID AND _ipparent = 2;
 
 
 -- TEST deleteEntity - should remove all versions
-CALL deleteIsa(@EntityID);
-CALL deleteEntity(@EntityID);
-SELECT count(*) INTO @x FROM entity_version WHERE entity_id = @EntityID;
+CALL deleteIsa(@EntityID3);
+CALL deleteEntity(@EntityID2);
+SELECT count(*) INTO @x FROM entity_version WHERE entity_id = @InternalEntityID;
 SELECT tap.eq(@x, 0, "no versions there any more");
 
-CALL deleteEntity(@ParentID);
+CALL deleteEntity(@EntityID3);
 
 CALL tap.finish();
 ROLLBACK;
@@ -218,21 +225,21 @@ DELETE FROM transactions;
 -- insert entity without versioning
 DELETE FROM feature_config WHERE _key = "ENTITY_VERSIONING";
 CALL entityACL(@ACLID1, "{acl1}");
-CALL insertEntity("EntityName", "EntityDesc", "RECORDTYPE", "{acl1}");
+CALL insertEntity(@EntityID4, "EntityName", "EntityDesc", "RECORDTYPE", "{acl1}");
 SELECT count(*) INTO @NumOfEntities FROM entities;
-SELECT entity_id INTO @EntityID FROM name_data WHERE value="EntityName";
+SELECT entity_id INTO @InternalEntityID FROM name_data WHERE value="EntityName";
 
 SET @TheUser = "TheUser"; -- used to identify the matching entry in transaction_log
 -- fill transaction_log: one entity with two updates (and one insert) and another entity with insert and delete.
 INSERT INTO transaction_log (transaction, entity_id, username, realm, seconds, nanos)
     -- the first entry is the one which is be found by _fix_unversioned
     VALUES
-        ("Update", @EntityID, @TheUser,     "CaosDB",  23458, 254),
+        ("Update", @InternalEntityID, @TheUser,     "CaosDB",  23458, 254),
         -- the rest is dummy data
-        ("Update", @EntityID, "OtherUser",  "CaosDB",   2345, 633), -- not the latest transaction
-        ("Insert", @EntityID, "OtherUser",  "CaosDB",    245, 633), -- not the latest transaction
-        ("Insert", @EntityID + 1, @TheUser, "CaosDB",   2325, 653), -- not the right entity, inserted before our target
-        ("Delete", @EntityID + 1, @TheUser, "CaosDB", 232526, 653); -- not the right entity, deleted after our target
+        ("Update", @InternalEntityID, "OtherUser",  "CaosDB",   2345, 633), -- not the latest transaction
+        ("Insert", @InternalEntityID, "OtherUser",  "CaosDB",    245, 633), -- not the latest transaction
+        ("Insert", @InternalEntityID + 1, @TheUser, "CaosDB",   2325, 653), -- not the right entity, inserted before our target
+        ("Delete", @InternalEntityID + 1, @TheUser, "CaosDB", 232526, 653); -- not the right entity, deleted after our target
 
 
 SELECT tap.eq(COUNT(*), 5, "five entries in transaction_log") FROM transaction_log;
@@ -252,11 +259,11 @@ SELECT tap.eq(COUNT(*), 2,
     "after _fix_unversioned, one entry for our test entity in transactions, one for the standard entities.")
     FROM transactions;
 
-SELECT tap.eq(entity_id, @EntityID, "versioned entity has correct id") FROM entity_version WHERE entity_id > 99;
+SELECT tap.eq(entity_id, @InternalEntityID, "versioned entity has correct id") FROM entity_version WHERE entity_id > 99;
 SELECT tap.ok(srid IS NOT NULL, "srid was generated and user/time matches entries from transaction_log")
     FROM transactions AS t JOIN transaction_log AS l
     ON (l.seconds = t.seconds AND l.nanos = t.nanos AND l.username = t.username AND l.realm = t.realm)
-    WHERE l.entity_id = @EntityID AND l.username = @TheUser;
+    WHERE l.entity_id = @InternalEntityID AND l.username = @TheUser;
 
 CALL tap.finish();
 ROLLBACK;
@@ -276,18 +283,18 @@ DELETE FROM transactions;
 DELETE FROM feature_config WHERE _key = "ENTITY_VERSIONING";
 
 CALL entityACL(@ACLID1, "{acl1}");
-CALL insertEntity("EntityName1", "EntityDesc1", "RECORDTYPE", "{acl1}");
-CALL insertEntity("EntityName2", "EntityDesc2", "RECORDTYPE", "{acl1}");
+CALL insertEntity(@EntityID5, "EntityName1", "EntityDesc1", "RECORDTYPE", "{acl1}");
+CALL insertEntity(@EntityID6, "EntityName2", "EntityDesc2", "RECORDTYPE", "{acl1}");
 SELECT count(*) INTO @NumOfEntities FROM entities;
-SELECT entity_id INTO @EntityID1 FROM name_data WHERE value="EntityName1";
-SELECT entity_id INTO @EntityID2 FROM name_data WHERE value="EntityName2";
+SELECT entity_id INTO @InternalEntityID1 FROM name_data WHERE value="EntityName1";
+SELECT entity_id INTO @InternalEntityID2 FROM name_data WHERE value="EntityName2";
 
 INSERT INTO transaction_log (transaction, entity_id, username, realm, seconds,
         nanos)
     -- the first entry is the one which will be found by _fix_unversioned
-    VALUES ("INSERT", @EntityID1, "User", "CaosDB", 10000, 250),
-        ("INSERT", @EntityID2, "User", "CaosDB", 10000, 250),
-        ("UPDATE", @EntityID2, "User", "CaosDB", 20000, 250);
+    VALUES ("INSERT", @InternalEntityID1, "User", "CaosDB", 10000, 250),
+        ("INSERT", @InternalEntityID2, "User", "CaosDB", 10000, 250),
+        ("UPDATE", @InternalEntityID2, "User", "CaosDB", 20000, 250);
 
 
 SELECT tap.eq(COUNT(*), 3, "three entries in transaction_log") FROM transaction_log;
@@ -310,10 +317,10 @@ SELECT tap.eq(COUNT(*), 3,
 
 SELECT tap.eq(seconds, 10000, "version seconds of entity 1 is correct")
     FROM entity_version AS v JOIN transactions AS t
-    ON (v.srid = t.srid) WHERE v.entity_id = @EntityID1;
+    ON (v.srid = t.srid) WHERE v.entity_id = @InternalEntityID1;
 SELECT tap.eq(seconds, 20000, "version seconds of entity 2 is correct")
     FROM entity_version AS v JOIN transactions AS t
-    ON (v.srid = t.srid) WHERE v.entity_id = @EntityID2;
+    ON (v.srid = t.srid) WHERE v.entity_id = @InternalEntityID2;
 
 CALL tap.finish();
 ROLLBACK;
diff --git a/tests/test_insert_update_delete.sql b/tests/test_insert_update_delete.sql
index a11b05e3d9a72d6038800adebf5b73c699c2a2b8..20b3a3f59098a15a3ae8036f1a86d2ec9a17b805 100644
--- a/tests/test_insert_update_delete.sql
+++ b/tests/test_insert_update_delete.sql
@@ -4,6 +4,9 @@ CALL tap.no_plan();
 
 -- SETUP
 
+SET @EntityID1 = 10001;
+SET @EntityID2 = 10002;
+
 -- Disable versioning and only test the non-versioning behavior
 DELETE FROM feature_config WHERE _key = "ENTITY_VERSIONING";
 
@@ -16,31 +19,31 @@ SELECT entity_id into @TextDatatypeID FROM name_data WHERE value ="TEXT";
 -- TEST insertEntity
 SELECT tap.eq(COUNT(id), 0, "No entities")
     FROM entities WHERE id>=100;
-CALL insertEntity("EntityName", "EntityDesc", "RECORDTYPE", "{acl1}");
+CALL insertEntity(@EntityID1, "EntityName", "EntityDesc", "RECORDTYPE", "{acl1}");
 
 SELECT tap.eq(COUNT(entity_id), 1, "Entity has been inserted")
     FROM name_data WHERE value="EntityName";
 
-SELECT entity_id INTO @EntityID FROM name_data WHERE value="EntityName";
-SELECT tap.ok(@EntityID >= 100, "EntityID greater 99");
+SELECT entity_id INTO @InternalEntityID FROM name_data WHERE value="EntityName";
+SELECT tap.ok(@InternalEntityID >= 100, "EntityID greater 99");
 
 SELECT tap.eq(acl, @ACLID1, "correct acl id had been assigned")
-    FROM entities WHERE id=@EntityID;
+    FROM entities WHERE id=@InternalEntityID;
 
 
 -- TEST insertEntityProperty
-CALL insertEntity("AProperty", "APropDesc", "PROPERTY", "{acl1}");
-SELECT entity_id INTO @PropID FROM name_data WHERE value="AProperty";
-INSERT INTO data_type (domain_id, entity_id, property_id, datatype) VALUES (0, 0, @PropID, @TextDatatypeID);
+CALL insertEntity(@EntityID2, "AProperty", "APropDesc", "PROPERTY", "{acl1}");
+SELECT entity_id INTO @InternalPropertyID FROM name_data WHERE value="AProperty";
+INSERT INTO data_type (domain_id, entity_id, property_id, datatype) VALUES (0, 0, @InternalPropertyID, @TextDatatypeID);
 
 SELECT COUNT(*) INTO @x FROM null_data;
 SELECT tap.eq(@x, 0, "No data in null_data table");
-CALL insertEntityProperty(0, @EntityID, @PropID, "null_data", NULL, NULL, "RECOMMENDED", NULL, NULL, NULL, NULL, 0);
+CALL insertEntityProperty(0, @EntityID1, @EntityID2, "null_data", NULL, NULL, "RECOMMENDED", NULL, NULL, NULL, NULL, 0);
 SELECT COUNT(*) INTO @x FROM null_data;
 SELECT tap.eq(@x, 1, "One row in null_data table");
 
 -- TEST updateEntity
-CALL updateEntity(@EntityID, "NewEntityName", "NewEntityDesc", "RECORD", NULL, NULL, "{acl2}");
+CALL updateEntity(@EntityID1, "NewEntityName", "NewEntityDesc", "RECORD", NULL, NULL, "{acl2}");
 
 SELECT tap.eq(COUNT(entity_id), 0, "Old Entity name not present")
     FROM name_data WHERE value="EntityName";
@@ -48,21 +51,21 @@ SELECT tap.eq(COUNT(entity_id), 1, "Entity name has been updated")
     FROM name_data WHERE value="NewEntityName";
 
 SELECT tap.eq(acl, @ACLID2, "acl has been updated")
-    FROM entities WHERE id=@EntityID;
+    FROM entities WHERE id=@InternalEntityID;
 
 -- CALL updateEntity again an update the Name
-CALL updateEntity(@EntityID, "NewerEntityName", "NewerEntityDesc", "RECORD", NULL, NULL, "{acl2}");
-CALL updateEntity(@EntityID, "NewEntityName", "NewEntityDesc", "RECORD", NULL, NULL, "{acl2}");
+CALL updateEntity(@EntityID2, "NewerEntityName", "NewerEntityDesc", "RECORD", NULL, NULL, "{acl2}");
+CALL updateEntity(@EntityID2, "NewEntityName", "NewEntityDesc", "RECORD", NULL, NULL, "{acl2}");
 
 
 -- TEST deleteEntityProperties
-CALL deleteEntityProperties(@EntityID);
+CALL deleteEntityProperties(@EntityID1);
 SELECT COUNT(*) INTO @x FROM null_data;
 SELECT tap.eq(@x, 0, "data removed from null_data table");
 
 -- TEST deleteEntity
-CALL deleteEntity(@EntityID);
-CALL deleteEntity(@PropID);
+CALL deleteEntity(@EntityID1);
+CALL deleteEntity(@EntityID2);
 SELECT COUNT(id) INTO @x FROM entities WHERE id>100;
 SELECT tap.eq(@x, 0, "entity deleted");
 
diff --git a/tests/test_issues.sql b/tests/test_issues.sql
index ab64de844e01c2ad3e273d6ea1e0c24709781a09..ded706adb4b78b399c6890d2349e285d2b4cacef 100644
--- a/tests/test_issues.sql
+++ b/tests/test_issues.sql
@@ -1,5 +1,4 @@
 /**
- * ** header v3.0
  * This file is a part of the CaosDB Project.
  *
  * Copyright (C) 2020 IndiScale GmbH <info@indiscale.com>
@@ -25,6 +24,10 @@ USE _caosdb_schema_unit_tests;
 BEGIN;
 CALL tap.no_plan();
 
+SET @EntityID1 = 10001;
+SET @EntityID2 = 10002;
+SET @EntityID3 = 10003;
+SET @EntityID4 = 10004;
 
 -- ########################################################################
 -- TEST Issues from https://gitlab.com/caosdb/caosdb-mysqlbackend/-/issues
@@ -42,23 +45,18 @@ INSERT INTO transactions (srid,seconds,nanos,username,realm) VALUES
 CALL entityACL(@ACLID1, "{acl1}");
 
 -- Insert entities and obtain IDs
-CALL insertEntity("A", "Desc A", "RECORDTYPE", "{acl1}");
-CALL insertEntity("B", "Desc B", "RECORDTYPE", "{acl1}");
-CALL insertEntity("C", "Desc C", "RECORDTYPE", "{acl1}");
-CALL insertEntity("rec", "Desc rec", "RECORD", "{acl1}");
-
-SELECT entity_id INTO @ID_A FROM name_data WHERE value="A";
-SELECT entity_id INTO @ID_B FROM name_data WHERE value="B";
-SELECT entity_id INTO @ID_C FROM name_data WHERE value="C";
-SELECT entity_id INTO @ID_rec FROM name_data WHERE value="rec";
+CALL insertEntity(@EntityID1, "A", "Desc A", "RECORDTYPE", "{acl1}");
+CALL insertEntity(@EntityID2, "B", "Desc B", "RECORDTYPE", "{acl1}");
+CALL insertEntity(@EntityID3, "C", "Desc C", "RECORDTYPE", "{acl1}");
+CALL insertEntity(@EntityID4, "rec", "Desc rec", "RECORD", "{acl1}");
 
 -- Insert is-a relationships
-CALL insertIsA(@ID_A, @ID_B);
-CALL insertIsA(@ID_B, @ID_C);
-CALL insertIsA(@ID_rec, @ID_A);
+CALL insertIsA(@EntityID1, @EntityID2);
+CALL insertIsA(@EntityID2, @EntityID3);
+CALL insertIsA(@EntityID4, @EntityID1);
 
 -- Try to delete last child
 -- leads to failure in issue #21
-CALL deleteIsa(@ID_rec);
+CALL deleteIsa(@EntityID4);
 
 ROLLBACK;