We should prevent an user to submit Firm and consolidate process for same plan batch orders that have been already submitted for processing by another user.
Scenario is as follows:
- User A is selecting several planned batch orders for an item and is submitting the Firm and consolidate process.
- While the first process is still not yet completed (due to complexity of formula/route data), User B is selecting same planned batch order and is submitting Firm and consolidate process again.
- After some time, User B is receiving an error pointing to a deadlock that occurred on ReqPO table.
- After some more time, the process gets completed with success for User A.
- However, due to underlying deadlock issues, both processes are being delayed, leading to a performance problem.

Expectation is that the second user should be prevent to submit Firm and consolidate process for same planned batch orders that are being in process.