How to change WM Status of an outbound delivery??

Hi Experts,

I was trying to do PGI for an outbound delivery for which I created TO and did TO Confirmation.

After TO Confirmation , both the Picking Status and Overall WM Status was set as C

I was trying to execute WS_Delivery_Update for PGI.

After executing the FM,when i checked the outbound delivery in VL03N

OverallWMStatus changed to B.

But last night it was C after TO confirmation.

And now I cant do anything 😔

When I try to do PGI its stating that "Delivery has not yet been completely processed by WM"

Please help out??