How To Fix AD518 - No. of fields in key deleted. Can only be maintained for gen. buffering

SAP Error Message - Details

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 518

• Message text: No. of fields in key deleted. Can only be maintained for gen. buffering

What causes this issue?

You have changed the buffering type from <LS>generic</> to
<LS>resident</> or <LS>partial</>. As a result, data on the number of
key fields is deleted automatically. This information is not required
by the buffering type you have now selected.

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?

No action required.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD518 - No. of fields in key deleted. Can only be maintained for gen. buffering ?

  The SAP error message AD518 ("No. of fields in key deleted. Can only be maintained for gen. buffering") typically occurs in the context of database table buffering settings in SAP. This error indicates that there is an inconsistency in the key fields of a database table that is set for buffering.
  Cause:
  
  Key Field Deletion: The error arises when the number of key fields in a table has been reduced (i.e., fields have been deleted from the key) while the table is still set for buffering. SAP requires that if a table is buffered, the key fields must remain consistent.
  Buffering Settings: The buffering settings for the table may not be compatible with the changes made to the key fields. If the key fields are modified, the buffering settings need to be reviewed and potentially adjusted.
  
  Solution:
  
  Check Table Definition: Review the table definition in the Data Dictionary (SE11) to ensure that the key fields are correctly defined and that no unnecessary deletions have been made.
  Adjust Buffering Settings:
  
  If the key fields have been changed, you may need to change the buffering settings of the table. You can do this by:
  
  Going to transaction SE11.
  Entering the table name and clicking on "Display."
  Selecting "Technical Settings."
  Adjusting the buffering settings to "No buffering" or "Generic buffering" as appropriate.
  
  
  
  
  Re-activate the Table: After making changes to the key fields or buffering settings, you may need to activate the table again to ensure that the changes take effect.
  Transport Changes: If the changes are made in a development environment, ensure that they are transported to the quality and production environments as needed.
  
  Related Information:
  
  Buffering Types: SAP supports different types of buffering:
  
  No Buffering: No data is buffered.
  Generic Buffering: Buffers data based on the key fields.
  Full Buffering: All data is buffered.
  
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SE14 (Database Utility), and SE80 (Object Navigator) for managing database tables and their settings.
  Documentation: Refer to SAP Help documentation for more details on database buffering and key field management.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis team or refer to SAP Notes for any specific patches or updates related to this error.