REPLICA IS INCONSISTENT

Hi

WHEN I USE DPM 2012 TO SYSTEM STATE BACKUP FOR SERVER WITH WINDOWS 2008 R2 THE FOLLOWING EVENT APPEAR IN DPM EVENT LOG (EVENT ID : 33223 )Backup job for datasource: Non VSS Datasource Writer on production server failed and the replica is inconsistent < please help me how to fix this problem

note : I make the system state backup to another servers with dpm2012  succsefull