Enter a special stock indicator

What causes this issue?

On the initial screen, you specified under the <LS>stock type</> that
you wanted to display the
<DS:GLOS.3526C0E9AFAB52B9E10000009B38F974>special stocks</>, but did
not set a <DS:GLOS.3526C0EAAFAB52B9E10000009B38F974>special stock
indicator</>

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?

INCLUDE NA_EINGABE_PR_FEN LANGUAGE EN
Enter a special stock indicator or choose a different stock type.
You can also check whether special stocks exist.
INCLUDE MB_NA_MMBE LANGUAGE EN

Error message extract from SAP system. Copyright SAP SE.