database disk image is malformed

Database Error!
database disk image is malformed
Stack Trace (most recent call last):

  File "c:\python27\lib\threading.py", line 774, in __bootstrap
    self.__bootstrap_inner()

  File "c:\python27\lib\threading.py", line 801, in __bootstrap_inner
    self.run()

  File "C:\code\Hydrus\include\HydrusThreading.py", line 175, in run

  File "C:\code\Hydrus\include\HydrusDaemons.py", line 14, in DAEMONMaintainDB

  File "C:\code\Hydrus\include\ClientController.py", line 595, in MaintainDB

  File "C:\code\Hydrus\include\HydrusController.py", line 273, in WriteSynchronous

  File "C:\code\Hydrus\include\HydrusController.py", line 79, in _Write

  File "C:\code\Hydrus\include\HydrusDB.py", line 342, in Write

  File "C:\code\Hydrus\include\HydrusData.py", line 1774, in GetResult

Traceback (most recent call last):

  File "C:\code\Hydrus\include\HydrusDB.py", line 201, in _ProcessJob

  File "C:\code\Hydrus\include\ClientDB.py", line 6863, in _Write

  File "C:\code\Hydrus\include\ClientDB.py", line 1194, in _Analyze

DatabaseError: database disk image is malformed