Storage Location in Transaction MIGO against movement type 101

Hello All,

Case : There are two purchase orders with Account Assignment category as K and the material is also entered in the PO .

In the first case at the time of posting GR , storage location is visible in the Where Tab of MIGO transaction and for the second PO the Storage Location itself is not visible .

Could anyone let me know what might the cause of this problem.

Regards

Ramesh Ch