How To Fix /UI2/PAGE021 - Key fields must not be changed

SAP Error Message - Details

• Message type: E = Error

• Message class: /UI2/PAGE -

• Message number: 021

• Message text: Key fields must not be changed

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /UI2/PAGE021 - Key fields must not be changed ?

  The SAP error message /UI2/PAGE021 Key fields must not be changed typically occurs in the context of SAP Fiori applications or when working with SAP UI5 applications. This error indicates that there is an attempt to modify key fields in a data model that should remain unchanged. Key fields are essential for uniquely identifying records in a database, and altering them can lead to data integrity issues.
  
  Cause:
  
  Modification of Key Fields: The most common cause of this error is that the application is trying to change the value of a key field in a data entity. Key fields are defined in the data model and should not be modified after the record is created.
  Incorrect Data Binding: If the data binding in the UI is not set up correctly, it may lead to attempts to change key fields inadvertently.
  User Actions: Users may inadvertently try to edit fields that are defined as key