Dear Ludwig, dear All!
I went with my scenario, so one more time:
1. Inventory adjustment correction, I did it with cost price taken from last income (not sure if this Cost price is correct, but I didn't have another idea);
2. Counting journal with amount, which was not invoiced on PO, Cost price the same as for Inventory adjustment correction (still not sure if this Cost price is correct);
3. PO into minus with not invoiced items -> post Product receipt;
4. Invoice on 0,00;
5. Inventory recalculation...
2 Items fixed, one has now incorrect Unit price, but I am getting closer... :D