ORA-55731
Reservable column update is not supported in a distributed transaction.
Cause
A reservable column update is being issued as part of a distributed transaction or is part of a transaction that is being promoted to a distributed transaction.
Action
Do not perform reservable column updates in a distributed transaction or in a transaction that may be promoted to a distributed transaction. Update the reservable columns in a local transaction or alter the column to a non-reservable column.