Update PO line number automatically in Oracle

Hello All,

User created a PO with 100 lines.After entering the 100th line, he realized that the details of 15th line is wrong. Hence he deleted it.

This delete option will be available as PO is still not approved.Now the question is about the synchronizing the PO line number.

Since the 15th line is not there, user has to manually update all the line numbers(16th line num becomes 15th and 17th line num becomes 16th etc) till 100 which is cumbersome.

Is there any way to automatically update it.

Instance is R12.2.24

Thanks,

VB