In SP Under item structure table WD is not showing but is available under the plan input

Summary:

Unconstrained Plan

In supply planning, the work definition is not available under the item structure table, but it is available under the plan inputs(item structure table).

We are running a Production plan and When we try to release it work definition Not showing(Default) as expected.

When we check the item structure table, the Work definition column is not available.

At the same time we checked under the plan inputs yeah it is showing.

How to solve this

Thanks

24C