How To Fix U9504 - Changed entry in table with new entry in "Assignments" tab not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: U9 - Message Class for Output in Application Log

• Message number: 504

• Message text: Changed entry in table with new entry in "Assignments" tab not allowed

What causes this issue?

An entry to be changed or deleted in the following table contains
routing in its key that is to be entered in the plan assignment table
PLANMAP. This is not allowed.
Table / specific table key: &1 &2 &3 &4
Explanation of specific table key: Plan number

System Response

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

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message U9504 - Changed entry in table with new entry in "Assignments" tab not allowed ?

  The SAP error message U9504, which states "Changed entry in table with new entry in 'Assignments' tab not allowed," typically occurs when there is an attempt to modify an existing entry in a table that is not permitted due to the system's data integrity rules. This error is often related to the assignment of objects or entities in SAP, such as cost centers, internal orders, or other master data.
  Cause:
  
  Data Integrity Rules: The system enforces certain rules to maintain data integrity. If you are trying to change an existing entry in a way that conflicts with these rules, the error will be triggered.
  Incorrect Assignment: You may be trying to assign a new entry to a field that is already populated with an existing entry, which is not allowed.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to make changes to the entries in the specified table.
  Configuration Issues: There may be configuration settings in the system that restrict changes to certain entries.
  
  Solution:
  
  Review the Entry: Check the entry you are trying to modify. Ensure that you are not attempting to change a field that is locked or restricted.
  Use the Correct Transaction: Make sure you are using the appropriate transaction code for the changes you want to make. Some transactions are designed for creating new entries, while others are for modifying existing ones.
  Check for Existing Assignments: If you are trying to create a new assignment, ensure that there are no existing assignments that conflict with the new entry.
  Consult Documentation: Review the relevant SAP documentation or help files for the specific module you are working with to understand the rules governing the entries.
  Authorization Check: Ensure that you have the necessary authorizations to make changes to the entries in the table. If not, contact your SAP administrator to request the required permissions.
  Contact Support: If the issue persists, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with the transaction codes related to the specific module you are working with (e.g., CO for Controlling, MM for Materials Management).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed and resolved.
  
  By following these steps, you should be able to identify the cause of the U9504 error and implement a suitable solution.