How To Fix TN153 - Caution: Upgrade or Prepare is still running; import not allowed

TN153 - Overview

• Message type: E = Error

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

• Message number: 153

• Message text: Caution: Upgrade or Prepare is still running; import not allowed

What causes this issue?

You are upgrading your system. The upgrade is currently in the PREPARE
phase. You are not allowed to import OCS Packages (add-on
installations/upgrade, Support Packages) in this phase since this
changes the system state on which the current upgrade is based.

System Response

The import of the OCS queue terminates.

How to fix this error?

If the upgrade is in the PREPARE phase, and you have to import the OCS
queue, proceed as follows:
Delete the queue by using one of the following:
Support Package Manager: Choose <ZK>Display/ Define -> Delete Queue</>.
Add-On Installation Tool: Choose <ZK>Back</>.
Completely reset PREPARE as described in the upgrade guide.
Redefine the queue and import it.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TN153 - Caution: Upgrade or Prepare is still running; import not allowed ?

  The SAP error message TN153, which states "Caution: Upgrade or Prepare is still running; import not allowed," typically occurs during system upgrades or when performing certain maintenance tasks in the SAP environment. This message indicates that a previous upgrade or preparation process is still in progress, and as a result, no further imports or changes can be made until that process is completed.
  
  Cause:
  
  Ongoing Upgrade/Preparation: The most common cause is that an upgrade or preparation process is still running in the background. This could be due to a long-running upgrade or a process that has not been completed successfully.
  Locking Mechanism: SAP uses a locking mechanism to prevent changes while critical processes are running. If the system detects that an upgrade or preparation is still active, it will block any import attempts.
  System Errors: Sometimes, if an upgrade process fails or hangs, it may not release the lock properly, leading to this error.
  
  
  Solution:
  
  Check