SAP Message 9J539 - Available stock with acty type & but removal sequence does not allow use

Diagnosis
Stock exists in activity type &v1&. However, you cannot use this stockto cover your requirement, because activity type &V1& cannot be used inthe removal sequence.

Procedure
Check whether the removal sequence is correct and add activity type &v1&
, if necessary.
IF &DEVICE& = 'SCREEN'
Execute Function
ENDIF