Bank Reconciliation Issue in postings FF_5

We have three bank accounts

Incoming Clearing Accounts

Outgoing Clearing Accounts

Main Bank Account

When uploading the Bank reconciliation (MT940) via FF_5, the system has configured in a way that it reconciles the entries between incoming/outgoing and main. The reconciliation takes place based on the assignment field and the check number gets updated after running FF_5.

In Quality this mechanism works well by posting the check number in the assignment field after performing FF_5 but in