Change of stock type not possible in case of recount

What causes this issue?

You cannot change the stock type in the event of a recount.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

If you want to include a different stock type in the count, you must
create a new physical inventory document.

Error message extract from SAP system. Copyright SAP SE.