SAP Message 12189 - Batch &1 of material &2 is locked by user &4 in plant &3

Diagnosis
Batch &V1& of material &V2& is currently locked in plant&V3& and cannot be edited. The lock was set during editing ofanother batch of material &V2& to ensure that the batches ofthis material are classified consistently.
In plant &V3&, there are various classified batches for material&V2&, which is not classified. At least one of the batches ofmaterial &V2& is being edited in a parallel session, whereby thesystem set a lock for batch &V1& in plant &V3&. This lockshould prevent different classes from being assigned to these batchesas a result of simultaneous editing of batches of material &V2&in various sessions.

Procedure
Finish editing all batches of material &V1& in parallelsessions.