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

SAP Error Message - Details

• 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 it is intended to be used in the way it is being referenced.
  Reassign Index: If the index is meant to be assigned multiple times, you may need to adjust the assignment in the relevant database table or view.
  Database Consistency Check: Run a consistency check on the database to identify any issues with the table or index definitions. You can use transaction SE14 (Database Utility) to check and adjust the database objects.
  Recreate Index: If the index is corrupted or incorrectly defined, consider dropping and recreating the index.
  Consult Documentation: Refer to SAP documentation or notes related to the specific version of SAP you are using, as there may be version-specific considerations or patches available.
  
  Related Information:
  
  Transaction Codes: SE11 (Data Dictionary), SE14 (Database Utility), SE80 (Object Navigator).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search for AQ511 in the SAP Support Portal.
  Database Administration: If you have access to database administration tools, you may want to check the underlying database for any integrity issues or constraints that could be causing this error.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.