SAP Message 12191 - Batch &1 is already locked by user &2

Diagnosis
Batch &V1&, which is assigned to material &V3&, iscurrently locked and cannot be edited. The lock was set during editingof another batch of material &V3& to ensure that the batches ofthis material are classified consistently.
There a various classified batches for material &V3&, whichitself is not classified. At least one of these batches is being editedin a parallel session, whereby the system set a lock for batch &V1&
. This lock should prevent different classes from being assigned tothese batches as a result of simultaneous editing of batches ofmaterial &V3& in various sessions.

Procedure
Finish editing all batches of material &V3& in parallelsessions.