Err in VL02N: "Deficit of SL Unristricted-use.."

D Friends,

Delivery has been created. While doing PGI in VL02N, err: “Deficit of SL Unrestricted-use 5.00 MT : 1900XXXXX Plant Strg loc”. Issue is not how to solve this err. Infact we want this err. But it should come while creating Delivery. Pl tell how to bring this err in VL01N.

Thanks.