2795 MLoad MARK DUPLICATE UPDATE
An MLoad apply error table row with this code marks a duplicate-update event where the newly built row is identical to an old row in the target table. This event will only occur if the target table has a non-unique primary index (NUPI).
AMP MLoad steps
The MLoad user must decide if the duplicate row is an anomaly. The user may then use the contents of the error table row to perform event logging or recovery actions.