I get this error while trying to access the nuplan_db_orm modules

[Akamel01]

from nuplan.database.nuplan_db_orm.nuplandb import NuPlanDB

Traceback (most recent call last):
File "/snap/pycharm-community/332/plugins/python-ce/helpers/pydev/pydevconsole.py", line 364, in runcode
coro = func()
File "", line 1, in
File "/snap/pycharm-community/332/plugins/python-ce/helpers/pydev/_pydev_bundle/pydev_import_hook.py", line 21, in do_import
module = self._system_import(name, *args, **kwargs)
File "/home/akamel/nuplan-devkit/nuplan/database/nuplan_db_orm/nuplandb.py", line 13, in
from nuplan.database.nuplan_db_orm.image import Image
File "/snap/pycharm-community/332/plugins/python-ce/helpers/pydev/_pydev_bundle/pydev_import_hook.py", line 21, in do_import
module = self._system_import(name, *args, **kwargs)
File "/home/akamel/nuplan-devkit/nuplan/database/nuplan_db_orm/image.py", line 22, in
from nuplan.database.nuplan_db_orm.lidar_pc import LidarPc
File "/snap/pycharm-community/332/plugins/python-ce/helpers/pydev/_pydev_bundle/pydev_import_hook.py", line 21, in do_import
module = self._system_import(name, *args, **kwargs)
File "/home/akamel/nuplan-devkit/nuplan/database/nuplan_db_orm/lidar_pc.py", line 21, in
from nuplan.database.nuplan_db_orm.scene import Scene
File "/snap/pycharm-community/332/plugins/python-ce/helpers/pydev/_pydev_bundle/pydev_import_hook.py", line 21, in do_import
module = self._system_import(name, *args, **kwargs)
File "/home/akamel/nuplan-devkit/nuplan/database/nuplan_db_orm/scene.py", line 19, in
class Scene(Base):
File "/home/akamel/miniconda3/envs/nuplan/lib/python3.9/site-packages/sqlalchemy/orm/decl_api.py", line 193, in init
)
File "/home/akamel/miniconda3/envs/nuplan/lib/python3.9/site-packages/sqlalchemy/orm/decl_base.py", line 248, in _as_declarative
cls = self.cls
File "/home/akamel/miniconda3/envs/nuplan/lib/python3.9/site-packages/sqlalchemy/orm/decl_base.py", line 329, in setup_mapping
if _get_immediate_cls_attr(self.cls, "declare_last"):
File "/home/akamel/miniconda3/envs/nuplan/lib/python3.9/site-packages/sqlalchemy/orm/decl_base.py", line 566, in init
# on a superclass that is mapped, then
File "/home/akamel/miniconda3/envs/nuplan/lib/python3.9/site-packages/sqlalchemy/orm/decl_base.py", line 1011, in _scan_attributes
# we can't write it because field.metadata is immutable :( so we have
File "/home/akamel/miniconda3/envs/nuplan/lib/python3.9/site-packages/sqlalchemy/orm/decl_base.py", line 1285, in _collect_annotation
File "/home/akamel/miniconda3/envs/nuplan/lib/python3.9/site-packages/sqlalchemy/orm/util.py", line 2365, in _extract_mapped_subtype
sqlalchemy.exc.ArgumentError: Type annotation for "Scene.goal_ego_pose" can't be correctly interpreted for Annotated Declarative Table form. ORM annotations should normally make use of the Mapped[] generic type, or other ORM-compatible generic type, as a container for the actual type, which indicates the intent that the attribute is mapped. Class variables that are not intended to be mapped by the ORM should use ClassVar[]. To allow Annotated Declarative to disregard legacy annotations which don't use Mapped[] to pass, set "allow_unmapped = True" on the class or a superclass this class. (Background on this error at: https://sqlalche.me/e/20/zlpr)

[Akamel01]

I found the solution.

this line
allow_unmapped = True
should be added before the line
tablename = 'xxxx'

in the following files (scene.py, scenario_tag.py. track.py, TrafficLightStatus.py)