Avoid deleting entries from the VBUV when the expected price of an item is not correct

What is the simplest method to avoid the deletion of entries from VBUV if there are items in VBAP with the field CEPOK = 'B' (Expected price not correct), even though the sales document has been fully processed (VBELN-GBSTK = 'C')?Essentially, VBUV s...