Release change settlement problem.

[Guest]

Dear SAP gurus,
After the upgrade from 3.1I to 4.6C the settlement rule is giving an error while running the actual settlement run only for the orders created in 3.1I. Once I delete the settlement rule from the order master and then re-enter it everything is working fine.

How do I fix all the orders w/o going into each one and recreating the settlement rule?
Thanx in advance.