SBG 9.5 - Anti Spam Filtered Errors

Our end-user’s Anti Spam SBG has encountered error which some of our emails were filtered. The problem is happening due to 4 fields "LastScanOID", "LastScanOIDCheck", "LastScannedVersion" and "LastScannedVersionCheck" which are added by Symantec while scanning the attachments. Anyone can help me on this? Cause some of webmail users can't open any attachment or even the mail.