2394963 - Cannot update endKey to less than the current startKey

Following execption is found in DA server log:

A 2016-09-15 12:00:52.052 STD .@149 Exception in thread "DA LogReaderQueue-queuer"
A 2016-09-15 12:00:52.052 STD .@149 java.lang.IllegalArgumentException: Cannot update endKey to less than the current startKey: Key: ['AT_120916'] diff=I, pos=87979 <> Key: ['AT_120916'] diff=I, pos=87984
A 2016-09-15 12:00:52.052 STD .@149     at com.sybase.da.compare.log.LogPredicateQueue$KeyRange.updateEndKey(Unknown Source)
A 2016-09-15 12:00:52.052 STD .@149     at com.sybase.da.compare.log.LogPredicateQueue$a.c(Unknown Source)
A 2016-09-15 12:00:52.052 STD .@149     at com.sybase.da.compare.log.LogPredicateQueue$a.run(Unknown Source)

SAP Replication Server (SRS) 15.7.1
Replication Server Data Assurance Option - DA Server/15.7.1/SP120

DA server, Data Assurance, startKey, endKey , KBA , BC-SYB-REP , Sybase Replication Server (standalone) , Problem