Error Message on Glo

calibre, version 0.9.28
ERROR: Error: Error communicating with device

database disk image is malformed

Traceback (most recent call last):
File "site-packages/calibre/gui2/device.py", line 85, in run
File "site-packages/calibre/gui2/device.py", line 470, in _books
File "site-packages/calibre/devices/kobo/driver.py", line 1674, in books
DatabaseError: database disk image is malformed

When the Glo is connecting to Calibre I get this message anyone know how to fix it?

Glo works find and can read my books even with error


thanks