DB editor doesn't load entities when opened

[PiispaH]

Sometimes when opening Toolbox and then opening db editor for a db that has entities and parameter values in it, the entities don't load into the editor but the parameter values do.

Traceback (most recent call last):
  File "C:\toolbox\lib\site-packages\sqlalchemy\util\_collections.py", line 210, in __getattr__
    return self._data[key]
KeyError: 'commit_id'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\spine-toolbox\spinetoolbox\helpers.py", line 122, in new_function
    return func(*args, **kwargs)
  File "C:\spine-toolbox\spinetoolbox\fetch_parent.py", line 93, in _apply_pending_changes
    self.handle_items_added({db_map: data})
  File "C:\spine-toolbox\spinetoolbox\fetch_parent.py", line 292, in handle_items_added
    self._handle_items_added(db_map_data)
  File "C:\spine-toolbox\spinetoolbox\spine_db_editor\mvcmodels\multi_db_tree_item.py", line 294, in handle_items_added
    self.append_children_by_id(db_map_ids)
  File "C:\spine-toolbox\spinetoolbox\spine_db_editor\mvcmodels\multi_db_tree_item.py", line 314, in append_children_by_id
    self._merge_children(new_children)
  File "C:\spine-toolbox\spinetoolbox\spine_db_editor\mvcmodels\multi_db_tree_item.py", line 254, in _merge_children
    self._insert_children_sorted(unmerged)
  File "C:\spine-toolbox\spinetoolbox\spine_db_editor\mvcmodels\multi_db_tree_item.py", line 260, in _insert_children_sorted
    self.insert_children(pos, chunk)
  File "C:\spine-toolbox\spinetoolbox\spine_db_editor\mvcmodels\multi_db_tree_item.py", line 400, in insert_children
    if not super().insert_children(position, children):
  File "C:\spine-toolbox\spinetoolbox\mvcmodels\minimal_tree_model.py", line 161, in insert_children
    self._polish_children(children)
  File "C:\spine-toolbox\spinetoolbox\spine_db_editor\mvcmodels\entity_tree_item.py", line 75, in _polish_children
    db_map_entity_class_ids = {
  File "C:\spine-toolbox\spinetoolbox\spine_db_editor\mvcmodels\entity_tree_item.py", line 76, in <dictcomp>
    db_map: {x["class_id"] for x in self.db_mngr.get_items(db_map, "entity", only_visible=False)}
  File "C:\spine-toolbox\spinetoolbox\spine_db_manager.py", line 636, in get_items
    db_map.cache.fetch_all(item_type)
  File "C:\toolbox\src\spinedb-api\spinedb_api\db_cache_base.py", line 218, in fetch_all
    while self.fetch_more(item_type):
  File "C:\toolbox\src\spinedb-api\spinedb_api\db_cache_base.py", line 215, in fetch_more
    return bool(self.advance_query(item_type))
  File "C:\toolbox\src\spinedb-api\spinedb_api\db_cache_base.py", line 193, in advance_query
    chunk = self._get_next_chunk(item_type)
  File "C:\toolbox\src\spinedb-api\spinedb_api\db_cache_base.py", line 171, in _get_next_chunk
    qry = self._query(item_type)
  File "C:\toolbox\src\spinedb-api\spinedb_api\db_cache_impl.py", line 76, in _query
    return self._db_map.query(getattr(self._db_map, sq_name))
  File "C:\toolbox\src\spinedb-api\spinedb_api\db_mapping_base.py", line 562, in wide_entity_sq
    ext_entity_sq.c.commit_id,
  File "C:\toolbox\lib\site-packages\sqlalchemy\util\_collections.py", line 212, in __getattr__
    raise AttributeError(key)
AttributeError: commit_id

[PiispaH]

Can't seem to reproduce anymore with other databases.