How To Fix TN871 - Backup for package &1 is blocked by package &2

TN871 - Overview

• Message type: E = Error

• Message class: TN - Support Package Manager (SPAM) Messages

• Message number: 871

• Message text: Backup for package &1 is blocked by package &2

What causes this issue?

A backup was created for a transport-based correction instruction for
SAP Notes &V1&. This backup cannot be restored because an additional
transport-based correction instruction for SAP Notes &V2& has been
implemented in the meantime.

System Response

It is currently not possible to restore the backup.

How to fix this error?

First, restore the backup of the transport-based correction instruction
for SAP Notes &V2&. Then restore the backup of the transport-based
correction instruction for SAP Notes &V1&.

Error message extract from SAP system. Copyright SAP SE.

TN871 - Details

• The SAP error message TN871 indicates that a backup operation for a transport package (package &1) is blocked because another transport package (package &2) is currently being processed. This situation typically arises in the context of the SAP Transport Management System (TMS), where multiple transport requests are being handled simultaneously.
  
  Cause:
  
  Concurrent Processing: The error occurs when two transport requests are trying to access the same transport directory or are in a state that prevents one from proceeding while the other is still being processed.
  Locking Mechanism: SAP uses a locking mechanism to ensure data integrity during transport operations. If one package is being processed, it locks certain resources, preventing other packages from being backed up or processed until the lock is released.
  
  
  Solution:
  
  Check Transport Status: Use transaction code SE09 or SE10 to check the status of the transport requests. Identify which package (package &2) is currently being processed and causing the blockage.
  Wait for