Lean WM- reverse picked quantity

Hello,

I've picked a delivery item with a TO in Lean WM.

I want to reverse the pickng but can't do it through LT0G as the line is locked.

I've tried changing the pick quantity in the delivery and it goes back when I save the delivery.

I tried creating a new TO through LT01, but it's not allowed in Lean WM.

Can anybodsy help me?

Thanks,

Sivan