diff --git a/inventory_management_system_api/routers/v1/catalogue_category.py b/inventory_management_system_api/routers/v1/catalogue_category.py
index a829287e..a42ab867 100644
--- a/inventory_management_system_api/routers/v1/catalogue_category.py
+++ b/inventory_management_system_api/routers/v1/catalogue_category.py
@@ -26,6 +26,7 @@
     CatalogueCategoryPropertyPostSchema,
     CatalogueCategoryPropertySchema,
     CatalogueCategorySchema,
+    CATALOGUE_CATEGORY_WITH_CHILD_NON_EDITABLE_FIELDS,
 )
 from inventory_management_system_api.services.catalogue_category import CatalogueCategoryService
 from inventory_management_system_api.services.catalogue_category_property import CatalogueCategoryPropertyService
@@ -185,7 +186,9 @@ def partial_update_catalogue_category(
         logger.exception(message)
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=message) from exc
     except ChildElementsExistError as exc:
-        message = "Catalogue category has child elements and cannot be updated"
+        message = "Catalogue category has child elements, so the following fields cannot be updated: " + ", ".join(
+            CATALOGUE_CATEGORY_WITH_CHILD_NON_EDITABLE_FIELDS
+        )
         logger.exception(message)
         raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail=message) from exc
     except DuplicateRecordError as exc:
diff --git a/inventory_management_system_api/routers/v1/catalogue_item.py b/inventory_management_system_api/routers/v1/catalogue_item.py
index 624b54de..31d0f752 100644
--- a/inventory_management_system_api/routers/v1/catalogue_item.py
+++ b/inventory_management_system_api/routers/v1/catalogue_item.py
@@ -21,6 +21,7 @@
     CatalogueItemPatchSchema,
     CatalogueItemPostSchema,
     CatalogueItemSchema,
+    CATALOGUE_ITEM_WITH_CHILD_NON_EDITABLE_FIELDS,
 )
 from inventory_management_system_api.services.catalogue_item import CatalogueItemService
 
@@ -161,7 +162,9 @@ def partial_update_catalogue_item(
         logger.exception(message)
         raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail=message) from exc
     except ChildElementsExistError as exc:
-        message = "Catalogue item has child elements and cannot be updated"
+        message = "Catalogue item has child elements, so the following fields cannot be updated: " + ", ".join(
+            CATALOGUE_ITEM_WITH_CHILD_NON_EDITABLE_FIELDS
+        )
         logger.exception(message)
         raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail=message) from exc
     except InvalidActionError as exc:
diff --git a/test/e2e/test_catalogue_category.py b/test/e2e/test_catalogue_category.py
index e7fd4c15..a57177cd 100644
--- a/test/e2e/test_catalogue_category.py
+++ b/test/e2e/test_catalogue_category.py
@@ -36,6 +36,10 @@
 
 from inventory_management_system_api.core.consts import BREADCRUMBS_TRAIL_MAX_LENGTH
 
+from inventory_management_system_api.schemas.catalogue_category import (
+    CATALOGUE_CATEGORY_WITH_CHILD_NON_EDITABLE_FIELDS,
+)
+
 
 class CreateDSL:
     """Base class for create tests."""
@@ -987,7 +991,9 @@ def test_partial_update_non_leaf_to_leaf_when_has_child_catalogue_category(self)
         self.patch_catalogue_category(catalogue_category_id, {"is_leaf": True})
 
         self.check_patch_catalogue_category_failed_with_detail(
-            409, "Catalogue category has child elements and cannot be updated"
+            409,
+            "Catalogue category has child elements, so the following fields cannot be updated: "
+            + ", ".join(CATALOGUE_CATEGORY_WITH_CHILD_NON_EDITABLE_FIELDS),
         )
 
     def test_partial_update_leaf_all_valid_values_when_no_children(self):
@@ -1032,7 +1038,9 @@ def test_partial_update_leaf_to_non_leaf_when_has_child_catalogue_item(self):
         self.patch_catalogue_category(catalogue_category_id, {"is_leaf": False})
 
         self.check_patch_catalogue_category_failed_with_detail(
-            409, "Catalogue category has child elements and cannot be updated"
+            409,
+            "Catalogue category has child elements, so the following fields cannot be updated: "
+            + ", ".join(CATALOGUE_CATEGORY_WITH_CHILD_NON_EDITABLE_FIELDS),
         )
 
     def test_partial_update_leaf_properties_when_has_child_catalogue_item(self):
@@ -1044,7 +1052,9 @@ def test_partial_update_leaf_properties_when_has_child_catalogue_item(self):
         self.patch_catalogue_category(catalogue_category_id, {"properties": []})
 
         self.check_patch_catalogue_category_failed_with_detail(
-            409, "Catalogue category has child elements and cannot be updated"
+            409,
+            "Catalogue category has child elements, so the following fields cannot be updated: "
+            + ", ".join(CATALOGUE_CATEGORY_WITH_CHILD_NON_EDITABLE_FIELDS),
         )
 
     def test_partial_update_leaf_to_non_leaf_with_properties(self):
@@ -1087,7 +1097,9 @@ def test_partial_update_is_leaf_with_child_catalogue_category(self):
 
         self.patch_catalogue_category(catalogue_category_id, {"is_leaf": True})
         self.check_patch_catalogue_category_failed_with_detail(
-            409, "Catalogue category has child elements and cannot be updated"
+            409,
+            "Catalogue category has child elements, so the following fields cannot be updated: "
+            + ", ".join(CATALOGUE_CATEGORY_WITH_CHILD_NON_EDITABLE_FIELDS),
         )
 
     def test_partial_update_leaf_properties(self):
diff --git a/test/e2e/test_catalogue_item.py b/test/e2e/test_catalogue_item.py
index f02652ee..1816d945 100644
--- a/test/e2e/test_catalogue_item.py
+++ b/test/e2e/test_catalogue_item.py
@@ -53,6 +53,8 @@
 from bson import ObjectId
 from httpx import Response
 
+from inventory_management_system_api.schemas.catalogue_item import CATALOGUE_ITEM_WITH_CHILD_NON_EDITABLE_FIELDS
+
 
 class CreateDSL(CatalogueCategoryCreateDSL, ManufacturerCreateDSL):
     """Base class for create tests."""
@@ -1184,7 +1186,9 @@ def test_partial_update_manufacturer_id_with_children(self):
 
         self.patch_catalogue_item(catalogue_item_id, {"manufacturer_id": new_manufacturer_id})
         self.check_patch_catalogue_item_failed_with_detail(
-            409, "Catalogue item has child elements and cannot be updated"
+            409,
+            "Catalogue item has child elements, so the following fields cannot be updated: "
+            + ", ".join(CATALOGUE_ITEM_WITH_CHILD_NON_EDITABLE_FIELDS),
         )
 
     def test_partial_update_manufacturer_id_with_non_existent_id(self):
@@ -1459,7 +1463,9 @@ def test_partial_update_properties_with_children(self):
 
         self.patch_catalogue_item(catalogue_item_id, {"properties": []})
         self.check_patch_catalogue_item_failed_with_detail(
-            409, "Catalogue item has child elements and cannot be updated"
+            409,
+            "Catalogue item has child elements, so the following fields cannot be updated: "
+            + ", ".join(CATALOGUE_ITEM_WITH_CHILD_NON_EDITABLE_FIELDS),
         )
 
     def test_partial_update_obsolete_replacement_catalogue_item_id(self):