No goods issue can be posted- error in STO

Dear Experts,

I am trying to post GI for an outbound delivery in VL02N.

This delivery was created when I did Goods Issue in MB1B using Mtype : 352 for a Stock Transfer Purchase Order

Kindly note that my Storage Location is WM+HU Managed. I confirmed TO aslo.

While I am trying to do PGI for outbound delivery in VL02N, I am encountered with the error " For item 00010 of purch. order 4500000901, no goods issue can be posted --- Message no. M7152"*

I am using a PO type for Stcok Transfer and also Item Category is U in PO Line

Kindly help me.

Regards,

Shetty