How to fix SAP error VV502?

What causes this issue? Material &V1& (plant &V2&) which you are processing is blocked by user &V3&. The system has attempted several times without success to block the material you are using.System Response To not hinder your work, the system stops its attempts of blocking and does not carry out an <GL:availability_check>availiability check</>.How to fix this error? The transaction you are processing is not confirmed. You should therefore carry out another availability check.Error message extract from SAP system. Copyright SAP SE.

How To Fix VV502 - Material & is locked (availability check not possible)

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VV502 - Overview

Message type: E = Error
Message class: VV - Requirements and availability
Message number: 502
Message text: Material & is locked (availability check not possible)
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What causes this issue?
Material &V1& (plant &V2&) which you are processing is blocked by user
&V3&. The system has attempted several times without success to block
the material you are using.
System Response
To not hinder your work, the system stops its attempts of blocking and
does not carry out an <GL:availability_check>availiability check</>.
How to fix this error?
The transaction you are processing is not confirmed. You
should therefore carry out another availability check.

Error message extract from SAP system. Copyright SAP SE.

VV502 - Details

Error Code: VV502
Error Message: Material & is locked (availability check not possible)

Summary
This error indicates that the system cannot perform an availability check for the specified material because the material is currently locked. This lock prevents any availability or stock checks from being executed.

Root Causes
The material master record is locked due to ongoing changes or updates (e.g., during material master maintenance).
A background job or process has locked the material for data consistency during batch updates or mass changes.
The material is locked due to a system or user-initiated lock (e.g., via transaction MM02 or MM06).
Custom or standard user-exits or BAdIs have implemented locks on the material during specific business processes.
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