数据恢复后 共享链接页面访问异常

当我使用5.x 版本的数据导入7.x 版本的数据之后。其他地方访问一切正常。之后在访问共享链接 页面的时候服务器出现如下错误。请问这个是什么问题。我应该如何解决。
django.request:135 handle_uncaught_exception Internal Server Error: /api/v2.1/share-links/
Traceback (most recent call last):
File “/opt/seafile/seafile-server-7.0.4/seahub/thirdpart/django/core/handlers/exception.py”, line 41, in inner
response = get_response(request)
File “/opt/seafile/seafile-server-7.0.4/seahub/thirdpart/django/core/handlers/base.py”, line 249, in _legacy_get_response
response = self._get_response(request)
File “/opt/seafile/seafile-server-7.0.4/seahub/thirdpart/django/core/handlers/base.py”, line 187, in _get_response
response = self.process_exception_by_middleware(e, request)
File “/opt/seafile/seafile-server-7.0.4/seahub/thirdpart/django/core/handlers/base.py”, line 185, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File “/opt/seafile/seafile-server-7.0.4/seahub/thirdpart/django/views/decorators/csrf.py”, line 58, in wrapped_view
return view_func(*args, **kwargs)
File “/opt/seafile/seafile-server-7.0.4/seahub/thirdpart/django/views/generic/base.py”, line 68, in view
return self.dispatch(request, *args, **kwargs)
File “/opt/seafile/seafile-server-7.0.4/seahub/thirdpart/rest_framework/views.py”, line 466, in dispatch
response = self.handle_exception(exc)
File “/opt/seafile/seafile-server-7.0.4/seahub/thirdpart/rest_framework/views.py”, line 463, in dispatch
response = handler(request, *args, **kwargs)
File “/opt/seafile/seafile-server-7.0.4/seahub/seahub/api2/endpoints/share_links.py”, line 196, in get
link_info = get_share_link_info(fs)
File “/opt/seafile/seafile-server-7.0.4/seahub/seahub/api2/endpoints/share_links.py”, line 88, in get_share_link_info
data[‘permissions’] = fileshare.get_permissions()
File “/opt/seafile/seafile-server-7.0.4/seahub/seahub/share/models.py”, line 365, in get_permissions
assert False
AssertionError