Sales value inc VAT VKWRT is populating without even maintaining VKP0

Hi Geeks,

I am not maintaining any sales price for my article under VKP0, when i create PO and GR, my GR is updating with VKWRT for some stores and for some of them it's blank.

Could you please suggest what are the things causing to update VKWRT during the goods receipt?

I am not selling any article here, i am only purchasing and goods receipting the article.

regards

K