diff --git a/cognite/client/data_classes/_base.py b/cognite/client/data_classes/_base.py
index 618ff1162..02dfb3021 100644
--- a/cognite/client/data_classes/_base.py
+++ b/cognite/client/data_classes/_base.py
@@ -520,12 +520,6 @@ def dump(self, camel_case: Literal[True] = True) -> dict[str, Any]:
     def _get_update_properties(cls, item: CogniteResource | None = None) -> list[PropertySpec]:
         raise NotImplementedError
 
-    @classmethod
-    def _get_extra_identifying_properties(cls, item: CogniteResource | None = None) -> dict[str, Any]:
-        # This method is used to provide additional identifying properties for the update object.
-        # It is intended to be overridden by subclasses that need to provide additional identifying properties.
-        return {}
-
 
 T_CogniteUpdate = TypeVar("T_CogniteUpdate", bound=CogniteUpdate)
 
diff --git a/cognite/client/data_classes/hosted_extractors/sources.py b/cognite/client/data_classes/hosted_extractors/sources.py
index 640244db8..075c17e99 100644
--- a/cognite/client/data_classes/hosted_extractors/sources.py
+++ b/cognite/client/data_classes/hosted_extractors/sources.py
@@ -120,12 +120,6 @@ def _get_update_properties(cls, item: CogniteResource | None = None) -> list[Pro
             return []
         return _SOURCE_UPDATE_BY_TYPE[item._type]._get_update_properties(item)
 
-    @classmethod
-    def _get_extra_identifying_properties(cls, item: CogniteResource | None = None) -> dict[str, Any]:
-        if not isinstance(item, SourceWrite):
-            return {}
-        return {"type": item._type}
-
 
 class EventHubSourceWrite(SourceWrite):
     """A hosted extractor source represents an external source system on the internet.