Posting >Invoices >Insufficient inventory transactions with status picked

Hi Members,

I have this problem about posting invoices after credit note PO, the problem with Item like below:

Purchase order: PO-001501

Item number: PC-0689

Insufficient inventory transactions with status picked

Operation canceled

while I checked with Item model group about picking requirement.

but the error still happen.
who is have experience please instruct me
Thanks

Is the total quantity a negative? It is asking you to pick it implying you are returning it.