diff --git a/changes/TI-1895.other b/changes/TI-1895.other
new file mode 100644
index 00000000000..d426659c698
--- /dev/null
+++ b/changes/TI-1895.other
@@ -0,0 +1 @@
+Exclude the dossier assignment slot from propertysheets for teamraum deployments. [amo]
diff --git a/opengever/propertysheets/assignment.py b/opengever/propertysheets/assignment.py
index d69abb5eed2..1debe44b7f0 100644
--- a/opengever/propertysheets/assignment.py
+++ b/opengever/propertysheets/assignment.py
@@ -1,4 +1,5 @@
 from opengever.propertysheets import _
+from opengever.workspace import is_workspace_feature_enabled
 from zope.component import getUtility
 from zope.interface import implementer
 from zope.schema.interfaces import IVocabularyFactory
@@ -21,8 +22,9 @@ def __call__(self, context):
         for term in get_document_assignment_slots_vocab():
             assignment_terms.append(term)
 
-        for term in get_dossier_assignment_slots_vocab():
-            assignment_terms.append(term)
+        if not is_workspace_feature_enabled():
+            for term in get_dossier_assignment_slots_vocab():
+                assignment_terms.append(term)
 
         return SimpleVocabulary(assignment_terms)
 
diff --git a/opengever/propertysheets/definition.py b/opengever/propertysheets/definition.py
index fe1af4f7ba1..51e954997e4 100644
--- a/opengever/propertysheets/definition.py
+++ b/opengever/propertysheets/definition.py
@@ -4,7 +4,6 @@
 from opengever.propertysheets.default_from_member import attach_member_property_default_factory
 from opengever.propertysheets.exceptions import InvalidFieldType
 from opengever.propertysheets.exceptions import InvalidFieldTypeDefinition
-from opengever.propertysheets.exceptions import InvalidSchemaAssignment
 from opengever.propertysheets.helpers import add_current_value_to_allowed_terms
 from opengever.propertysheets.helpers import is_choice_field
 from opengever.propertysheets.helpers import is_multiple_choice_field
@@ -198,9 +197,11 @@ def assignments(self, values):
                 term = assignment_slots.getTermByToken(token)
                 assignments.append(term.value)
             except LookupError:
-                raise InvalidSchemaAssignment(
-                    "The assignment '{}' is invalid.".format(token)
-                )
+                # Missing slots should be ignored without raising an error.
+                # This allows custom properties to remain usable even if the corresponding slots no longer exist.
+                # Currently, this mainly occurs during testing or local development
+                # when switching between Gever and Teamraum.
+                continue
 
         self._assignments = tuple(assignments)
 
diff --git a/opengever/propertysheets/tests/test_propertysheet_metaschema.py b/opengever/propertysheets/tests/test_propertysheet_metaschema.py
index 586a3f71486..61253d2483e 100644
--- a/opengever/propertysheets/tests/test_propertysheet_metaschema.py
+++ b/opengever/propertysheets/tests/test_propertysheet_metaschema.py
@@ -410,3 +410,34 @@ def test_field_descriptions_are_translated(self, browser):
             ],
             [prop['description'] for prop in field_properties.values()]
         )
+
+
+class TestWorkSpacePropertysheetMetaschemaEndpoint(IntegrationTestCase):
+    features = ('workspace',)
+
+    @browsing
+    def test_assignment_vocabularies_excluded_dossier_type(self, browser):
+        self.login(self.propertysheets_manager, browser)
+
+        headers = self.api_headers.copy()
+        headers.update({'Accept-Language': 'de-ch'})
+
+        browser.open(
+            view="@propertysheet-metaschema",
+            headers=headers,
+        )
+
+        properties = browser.json['properties']
+        self.assertEqual(
+            [
+                u'Dokument',
+                u'Dokument (Typ: Anfrage)',
+                u'Dokument (Typ: Antrag)',
+                u'Dokument (Typ: Bericht)',
+                u'Dokument (Typ: Offerte)',
+                u'Dokument (Typ: Protokoll)',
+                u'Dokument (Typ: Reglement)',
+                u'Dokument (Typ: Vertrag)',
+                u'Dokument (Typ: Weisung)',
+            ],
+            properties['assignments']['items']['enumNames'])