NLAG goods receipt (GR)

Goog morning,

how can i do goods receipt on NLAG material?

We have purchase agreement with material set with item category NLAG (non stock item) - in purchase agreement we have defined account assingment and item category is F. I have created schedule lines and tried to do goods receipt in mb01 - i got error message no. M7022 - PU Ordered quantity exceeded by x EA - nr. of purch. agreement Plant code.

Could you help me with that?