Computer integration job is failing (error code"51")

We have integrated sm and ucmdb. ucmdb push date to sm. after a recent upgrade of sm computer integration jobs are failling (change push)  its taking long time to update computer records usually it takes 7 to 8 hrs daily to update the computer records. we have scheduled the data push (change) daily.


i can see there are lot of errors in the sm log which state that two fields in activitydevice tabe (history storing) gettinng truncated.


lot of fields are gettinng monitored as part of history updtes. is that a reson for slow performance of computer integration job?there is just an error code"51"


no other info present in ucmdb side.


any help on this is appreciated