How To Fix AQ511 - The index & is only assigned once

AQ511 - Overview

• Message type: E = Error

• Message class: AQ - Message texts for SAP Query

• Message number: 511

• Message text: The index & is only assigned once

What causes this issue?

So far, you have assigned an index to define an equality relationship
between two fields only once. When you leave this screen, these indexes
are reset.

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 AQ511 - The index & is only assigned once ?

  The SAP error message AQ511, which states "The index & is only assigned once," typically occurs in the context of SAP's data dictionary and indexing. This error indicates that there is an issue with the assignment of an index in a database table or view, where the system expects the index to be assigned multiple times but finds that it has only been assigned once.
  
  Cause:
  
  Index Definition: The index in question may have been defined incorrectly, or there may be a misunderstanding in how it should be used within the database structure.
  Database Table Structure: The underlying database table may have constraints or definitions that conflict with the expected usage of the index.
  Data Dictionary Issues: There may be inconsistencies or errors in the data dictionary definitions related to the index.
  
  
  Solution:
  
  Check Index Definition: Review the definition of the index in the data dictionary (transaction SE11). Ensure that it is defined correctly and that