change override state on calling pop

openpype/settings/entities/dict_mutable_keys_entity.py

@@ -60,6 +60,12 @@ class DictMutableKeysEntity(EndpointEntity):
     def pop(self, key, *args, **kwargs):
         if key in self.required_keys:
             raise RequiredKeyModified(self.path, key)
+
+        if self._override_state is OverrideState.STUDIO:
+            self._has_studio_override = True
+        elif self._override_state is OverrideState.PROJECT:
+            self._has_project_override = True
+
         result = self.children_by_key.pop(key, *args, **kwargs)
         self.on_change()
         return result