Internal Error When Moving Trac Ticket

[anonymous]

Attempting to copy a ticket from one trac to another. In source trac instance navigate to Admin > (Data Mover) Tickets. Entered the ticket number, clicked copy.

Traceback (most recent call last):
  File "C:\Program Files\Python24\lib\site-packages\trac\web\main.py", line 387, in dispatch_request
    dispatcher.dispatch(req)
  File "C:\Program Files\Python24\lib\site-packages\trac\web\main.py", line 237, in dispatch
    resp = chosen_handler.process_request(req)
  File "build\bdist.win32\egg\webadmin\web_ui.py", line 109, in process_request
  File "build\bdist.win32\egg\datamover\ticket.py", line 69, in process_admin_request
  File "build\bdist.win32\egg\datamover\util.py", line 60, in copy_ticket
  File "C:\Program Files\Python24\lib\site-packages\trac\db\util.py", line 50, in execute
    return self.cursor.execute(sql_escape_percent(sql), args)
  File "C:\Program Files\Python24\lib\site-packages\trac\db\sqlite_backend.py", line 56, in execute
    args or [])
  File "C:\Program Files\Python24\lib\site-packages\trac\db\sqlite_backend.py", line 48, in _rollback_on_error
    return function(self, *args, **kwargs)
OperationalError: table ticket_custom has no column named author