No suitable item found for PO XXXXXXX

Hi,

We are on ECC 6.0.

We ahve some Po's replicated to ECC from SRM.For these PO's,the vendors used have the GR based IV verification flag as blank in vendor master which means all suhc PO's should be IR only.

However for one such PO,the GR based IV verification and Goods receipotindicator was set in SRM and the same changes came over to ECC PO also.

There was only one line in the PO and qty for which was 12.

There were 2 GR;s done i.e. one for qty 8 and other for 4.Then there were two invoices done.i.e. one for qty 8 and other for qty 2.

Now the invoice for the remaining qty 2 needs to be posted in the system.Howveer in MIRO,in ECC,we get an error "no suitable item found for PO XXXXX".

Can someone please advise how to fix this error message?

NOTE:The delivery completed indicato is also unchecked in ECC PO.