diff --git a/CHANGELOG.md b/CHANGELOG.md
index ea3eff76a5fe0aa9a5bb912ef0002f82f2508248..b92ebce6de44057c5166d1a0d8a181a74574c8a0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Removed ###
 
+* The deprecated `parent` keyword from the YAML datamodel specification. Use
+  `inherit_from_{obligatory|recommended|suggested}` instead.
+
 ### Fixed ###
 
 - Json schema exporter handles reference properties better.
diff --git a/src/caosadvancedtools/models/parser.py b/src/caosadvancedtools/models/parser.py
index 37f34e7bcbae48188c96b9bea6434d59571020fd..fa21aa13b1ee666a36d94280865835b922d6c721 100644
--- a/src/caosadvancedtools/models/parser.py
+++ b/src/caosadvancedtools/models/parser.py
@@ -52,9 +52,7 @@ from linkahead.common.datatype import get_list_datatype
 from .data_model import CAOSDB_INTERNAL_PROPERTIES, DataModel
 
 # Keywords which are allowed in data model descriptions.
-KEYWORDS = ["parent",  # deprecated, use inherit_from_* instead:
-                       # https://gitlab.com/caosdb/caosdb-advanced-user-tools/-/issues/36
-            "importance",
+KEYWORDS = ["importance",
             "datatype",  # for example TEXT, INTEGER or REFERENCE
             "unit",
             "description",
@@ -595,16 +593,6 @@ debug : bool, optional
                     self._inherit(name, prop, db.RECOMMENDED)
                 elif prop_name == "inherit_from_suggested":
                     self._inherit(name, prop, db.SUGGESTED)
-                elif prop_name == "parent":
-                    warn(
-                        DeprecationWarning(
-                            "The `parent` keyword is deprecated and will be "
-                            "removed in a future version.  Use "
-                            "`inherit_from_{obligatory|recommended|suggested}` "
-                            "instead."
-                        )
-                    )
-                    self._inherit(name, prop, db.OBLIGATORY)
 
                 else:
                     raise ValueError("invalid keyword: {}".format(prop_name))
diff --git a/src/doc/index.rst b/src/doc/index.rst
index 6c2c5f9894ad5c0f5dc3f124de726d264f46d452..15a7b7ab7773f00149a58d948e3086775a059214 100644
--- a/src/doc/index.rst
+++ b/src/doc/index.rst
@@ -17,6 +17,8 @@ This documentation helps you to :doc:`get started<getting_started>`, explains th
    YAML data model specification <yaml_interface>
    Specifying a datamodel with JSON schema <json_schema_interface>
    _apidoc/modules
+   Related Projects <related_projects/index>
+   Back to overview <https://docs.indiscale.com/>
 
 
 
diff --git a/src/doc/related_projects/index.rst b/src/doc/related_projects/index.rst
new file mode 100644
index 0000000000000000000000000000000000000000..87808b4264dfdd37dfa162025b24d31e63de7083
--- /dev/null
+++ b/src/doc/related_projects/index.rst
@@ -0,0 +1,25 @@
+Related Projects
+++++++++++++++++
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+   :hidden:
+
+.. container:: projects
+
+   For in-depth documentation for users, administrators  and developers, you may want to visit the subproject-specific documentation pages for:
+
+   :`Server <https://docs.indiscale.com/caosdb-server/>`_: The Java part of the LinkAhead server.
+
+   :`MySQL backend <https://docs.indiscale.com/caosdb-mysqlbackend/>`_: The MySQL/MariaDB components of the LinkAhead server.
+
+   :`WebUI <https://docs.indiscale.com/caosdb-webui/>`_: The default web frontend for the LinkAhead server.
+
+   :`PyLinkAhead <https://docs.indiscale.com/caosdb-pylib/>`_: The LinkAhead Python library.
+
+   :`LinkAhead Crawler <https://docs.indiscale.com/caosdb-crawler/>`_: The crawler is the main tool for automatic data integration in LinkAhead.
+
+   :`LinkAhead <https://docs.indiscale.com/caosdb-deploy>`_: Your all inclusive LinkAhead software package.
+
+   :`Back to Overview <https://docs.indiscale.com/>`_: LinkAhead Documentation.
diff --git a/src/doc/yaml_interface.rst b/src/doc/yaml_interface.rst
index ac3914385d31df5a306b3f8400fbcb6b005f17fa..48e27802e72177424fd2c6258492b283bbff0d3b 100644
--- a/src/doc/yaml_interface.rst
+++ b/src/doc/yaml_interface.rst
@@ -109,7 +109,6 @@ Keywords
   added as parents, and all Properties with at least the importance ``XXX`` are inherited.  For
   example, ``inherited_from_recommended`` will inherit all Properties of importance ``recommended``
   and ``obligatory``, but not ``suggested``.
-- **parent**: Parent of this entity. Same as ``inherit_from_obligatory``. (*Deprecated*) 
 
 Usage
 =====
diff --git a/unittests/test_yaml_model_parser.py b/unittests/test_yaml_model_parser.py
index c66fef131f34e33c19335f5fd1e5858dec4b3e24..97c3450f654e7b836734335cafac37adc6e700bb 100644
--- a/unittests/test_yaml_model_parser.py
+++ b/unittests/test_yaml_model_parser.py
@@ -19,7 +19,7 @@
 import unittest
 from datetime import date
 from tempfile import NamedTemporaryFile
-from pytest import deprecated_call, raises, mark
+from pytest import raises, mark
 
 import linkahead as db
 from caosadvancedtools.models.parser import (TwiceDefinedException,
@@ -527,7 +527,7 @@ F:
 
 
 def test_issue_36():
-    """Test whether the `parent` keyword is deprecated.
+    """Test whether the `parent` keyword is removed.
 
     See https://gitlab.com/caosdb/caosdb-advanced-user-tools/-/issues/36.
 
@@ -550,17 +550,12 @@ R3:
   inherit_from_obligatory:
   - R1
 """
-    with deprecated_call():
-        # Check whether this is actually deprecated
+    with raises(ValueError) as ve:
+        # The keyword has been removed, so it should raise a regular ValueError.
         model = parse_model_from_string(model_string)
 
-    assert "R3" in model
-    r3 = model["R3"]
-    assert isinstance(r3, db.RecordType)
-    for par in ["R1", "R2"]:
-        # Until removal, both do the same
-        assert has_parent(r3, par)
-        assert r3.get_parent(par)._flags["inheritance"] == db.OBLIGATORY
+    assert "invalid keyword" in str(ve.value)
+    assert "parent" in str(ve.value)
 
 
 def test_yaml_error():