在 workspace 里添加团队成员时报错

@livid

Traceback (most recent call last):
File "/Library/Python/2.7/site-packages/tornado/web.py", line 1141, in _when_complete
callback()
File "/Library/Python/2.7/site-packages/tornado/web.py", line 1162, in _execute_method
self._when_complete(method(*self.path_args, **self.path_kwargs),
File "/www/workspace/workspace/security.py", line 44, in wrapper
return method(self, *args, **kwargs)
File "/www/workspace/workspace/handlers/desktop/project/team/__init__.py", line 124, in post
self.store.flush()
File "/Library/Python/2.7/site-packages/storm/store.py", line 501, in flush
self._flush_one(obj_info)
File "/Library/Python/2.7/site-packages/storm/store.py", line 538, in _flush_one
result = self._connection.execute(expr)
File "/Library/Python/2.7/site-packages/storm/databases/mysql.py", line 88, in execute
result = Connection.execute(self, statement, params)
File "/Library/Python/2.7/site-packages/storm/database.py", line 241, in execute
raw_cursor = self.raw_execute(statement, params)
File "/Library/Python/2.7/site-packages/storm/database.py", line 374, in raw_execute
self._run_execution(raw_cursor, args, params, statement)
File "/Library/Python/2.7/site-packages/storm/database.py", line 388, in _run_execution
self._check_disconnect(raw_cursor.execute, *args)
File "/Library/Python/2.7/site-packages/storm/database.py", line 454, in _check_disconnect
return function(*args, **kwargs)
File "/Library/Python/2.7/site-packages/MySQLdb/cursors.py", line 205, in execute
self.errorhandler(self, exc, value)
File "/Library/Python/2.7/site-packages/MySQLdb/connections.py", line 36, in defaulterrorhandler
raise errorclass, errorvalue
OperationalError: (1364, "Field 'last_signin' doesn't have a default value")