Diagnosis
When the update data is reorganized, it deletes inconsistent(incomplete) update requests. While one user is carrying out atransaction, the the update data is often in a state of incompletion.When the transaction is completed and the update begun, the data becomescomplete. If the data is reorganized in productive operation, temporaryinconsistencies may get deleted. A data inconsistency with incompletedata can therefore arise.

Procedure
Reorganize the update tables only where there are no users logged ontothe system.