Budget check incorrect in PO creation after FM Cut over

Dear Experts,

We have just implemented FM-BCS in the middle of the fiscal year. To update consumption from old documents before FM Activation, we used Reconstruction program FMN3N/FMN4N... After reconstruction, we experienced abnormal behaviours in PO creation from reconstructed PR as follow:

We have budget like this:

with consumption in PR

We create PO from PR with the exact same amount:

Normally, there will be no budget exceed in this step. However, in this case, the budget check inform a budget exceed of 1,100,000 (= Double amount of PR - Budget)

Can anyone have any suggestion how to solve this issue?

We are using EA-PS 600.

Thanks a lot,