GR reduction impossible. Wrong CI with FT 30 instead of 40 in GR/IR acct.

Hi Gurus

I want to clear my GR/IR G/L account using transaction code MR11 for a Service Order, and I'm getting error message' FMUP009 - GR reduction impossible. Wrong CI with FT 30 instead of 40 in GR/IR acct".

1. The FT of my GR/IR commitment item master record is currently set to 50 NOT to 30 as mentioned in the error message.

2. If I change the FT of my GR/IR commitment item to 40 (the correct setting), I still get the same error message as above.

Note: The offsetting commitment item's master record is set to a 30 (the normal setting for and expenditure commitment item).

Question: Could this be a program error?

Regards

Thuso Mudau