django - 将db从sqlite3转换为postgres时出现loaddata错误

I am trying to convert from a sqlite3 db to Postgres (so that I can have timezone-aware datetime fields with django 1.4). I dumped the data from the sqlite3 db. Then switched settings to point to the empty postgres db. Then ran syncdb, then south migrations. All good so far. I am trying to convert from a sqlite3 db to Pos