Funds Management - Actual Direct Posting Not Involving FI

Hello dear experts.

I have the following situation. Because of a bad configuration of fmderive when creating a PO, FM postings of fund center and commitment item went to DUMMY in both cases.

Now i need to post this expenditures to the correct fund center and commitment item. At accounting level everything is OK, i have to register the expenditure only in FM.

So, this posting has to be directly on actual. I tried FMZ1 but this transaction post to commitment.

How can i achieve this goal without involving posting from FI?

Thanks a lot,

Regards,

Fernando