trac-admin upgrade fails

[michael.nitschke@…]

d:\Program Files\Python25\Scripts>trac-admin g:\projects\trac\newone upgrade

Traceback (most recent call last):
  File "d:\Program Files\Python25\Scripts\trac-admin-script.py", line 8, in <mod
ule>
    load_entry_point('Trac==0.11.1', 'console_scripts', 'trac-admin')()
  File "d:\Program Files\Python25\Lib\site-packages\trac\admin\console.py", line
 1295, in run
    return admin.onecmd(command)
  File "d:\Program Files\Python25\Lib\site-packages\trac\admin\console.py", line
 123, in onecmd
    rv = cmd.Cmd.onecmd(self, line) or 0
  File "d:\Program Files\Python25\lib\cmd.py", line 219, in onecmd
    return func(arg)
  File "d:\Program Files\Python25\Lib\site-packages\trac\admin\console.py", line
 1145, in do_upgrade
    self.__env.upgrade(backup=do_backup)
  File "d:\Program Files\Python25\Lib\site-packages\trac\env.py", line 442, in u
pgrade
    participant.upgrade_environment(db)
  File "build\bdist.win32\egg\tracforms\tracdb.py", line 137, in upgrade_environ
ment
  File "build\bdist.win32\egg\tracforms\formdb.py", line 198, in dbschema_2008_0
6_15_0000
  File "build\bdist.win32\egg\tracforms\tracdb.py", line 87, in __call__
  File "build\bdist.win32\egg\tracforms\tracdb.py", line 42, in execute
sqlite3.OperationalError: near "unsigned": syntax error

other upgrades (for example BlogPartsMacro work like a charm)