Either enter threshold value or set Negative Stock indicator

What causes this issue?

You have entered a maximum/minimum stock level in the <LS>Threshold
value</> field and set the indicator so that only materials with
negative stock levels are to be selected.

How to fix this error?

Decide whether you want to carry out a physical inventory for materials
that have negative stocks only or for materials that have a particular
threshold value.

Error message extract from SAP system. Copyright SAP SE.