Any rollback that is required will be performed by the back-out patch OR*3*432. There are only two database updates in OR*3*423 (v30C). The first is to correct the 'C' and 'D' cross-references. There is no need to rollback these changes.
The second relates to quick orders using the PSO SUPPLY dialog. The movement from this dialog back to PSO OERR is necessary for supply quick orders to function appropriately so this change will not be rolled back.