How To Fix AD418 - Key field number was applied; save the data

AD418 - Overview

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 418

• Message text: Key field number was applied; save the data

What causes this issue?

The selected number of key fields was taken over.

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?

Now save all the attributes either explicitly or on exiting
from maintenance.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD418 - Key field number was applied; save the data ?

  The SAP error message AD418 ("Key field number was applied; save the data") typically occurs in the context of data entry or modification in SAP, particularly when dealing with key fields in a database table. This error indicates that a key field has been modified or is in a state that requires the data to be saved before proceeding with further actions.
  
  Cause:
  
  Modification of Key Fields: The error usually arises when a user attempts to change a key field (like a primary key) in a transaction without saving the changes first.
  Incomplete Data Entry: If the system detects that key fields have been altered but not saved, it prompts this error to ensure data integrity.
  Session Management: Sometimes, if multiple sessions are open, changes in one session may not be reflected in another, leading to this error.
  
  
  Solution:
  
  Save Changes: The immediate solution is to save the changes you have made to the key fields.