How To Fix ATO_CUSTOMER174 - Item cannot be changed because collection &1 is locked (&2).

ATO_CUSTOMER174 - Overview

• Message type: E = Error

• Message class: ATO_CUSTOMER - ATO Messages for the End User

• Message number: 174

• Message text: Item cannot be changed because collection &1 is locked (&2).

Self-Explanatory Message

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ATO_CUSTOMER174 - Details

• The SAP error message ATO_CUSTOMER174 indicates that an item cannot be changed because the associated collection is locked. This typically occurs in scenarios where a collection of items (such as a sales order, production order, or any other transactional data) is being processed or modified by another user or transaction, preventing concurrent changes.
  
  Cause:
  
  Locking Mechanism: SAP uses a locking mechanism to prevent data inconsistencies. If a user or process is currently editing or processing the collection, it will be locked for other users.
  Long-running Transactions: If a transaction takes a long time to complete, it can hold locks for an extended period, causing other users to encounter this error.
  Background Jobs: Sometimes, background jobs that are processing data can also lock collections, leading to this error for users trying to make changes.
  User Sessions: If a user has multiple sessions open and is working on the same collection, it can lead to locking issues.
  
  
  Solution:
  
  Wait