DIA-26799
unique constraint string.string violated for table string.string with column values string
Cause
The row to update or insert violated the unique constraint.
Action
For XStreams, define a conflict resolution, or resolve the conflict and execute the error transaction using DBMS_APPLY_ADM.EXECUTE_ERROR. For Sharding, if the apply process has been stopped, gather apply traces, debug and alert logs, and contact Oracle Support if the problem persists.