Traceback (most recent call last):
  File "/home/xian/.openclaw/workspace-coder/works/ai-chat/main.py", line 17, in <module>
    from models import init_db, get_db, User, Conversation, Message, SystemConfig
  File "/home/xian/.openclaw/workspace-coder/works/ai-chat/models/__init__.py", line 1, in <module>
    from .database import Base, engine, SessionLocal, get_db, init_db
  File "/home/xian/.openclaw/workspace-coder/works/ai-chat/models/database.py", line 33, in <module>
    class Conversation(Base):
  File "/home/xian/.local/lib/python3.10/site-packages/sqlalchemy/orm/decl_api.py", line 195, in __init__
    _as_declarative(reg, cls, dict_)
  File "/home/xian/.local/lib/python3.10/site-packages/sqlalchemy/orm/decl_base.py", line 247, in _as_declarative
    return _MapperConfig.setup_mapping(registry, cls, dict_, None, {})
  File "/home/xian/.local/lib/python3.10/site-packages/sqlalchemy/orm/decl_base.py", line 328, in setup_mapping
    return _ClassScanMapperConfig(
  File "/home/xian/.local/lib/python3.10/site-packages/sqlalchemy/orm/decl_base.py", line 574, in __init__
    self._extract_mappable_attributes()
  File "/home/xian/.local/lib/python3.10/site-packages/sqlalchemy/orm/decl_base.py", line 1507, in _extract_mappable_attributes
    raise exc.InvalidRequestError(
sqlalchemy.exc.InvalidRequestError: Attribute name 'metadata' is reserved when using the Declarative API.