How To Fix DDACT027 - You cannot change function fields (&: Type & with length of &, key field)

DDACT027 - Overview

• Message type: E = Error

• Message class: DDACT - Messages for Activating Dictionary Objects

• Message number: 027

• Message text: You cannot change function fields (&: Type & with length of &, key field)

Self-Explanatory Message

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DDACT027 - Details

• The SAP error message DDACT027 indicates that you are trying to change a function field that is defined as a key field in a database table. Key fields in SAP are used to uniquely identify records in a table, and as such, they have certain restrictions when it comes to modification.
  
  Cause:
  The error occurs when:
  
  You attempt to modify a key field in a database table or structure that is not allowed.
  The field is defined as a key field in the data dictionary (DDIC), and SAP enforces rules to maintain data integrity.
  
  
  Solution:
  To resolve this error, consider the following steps:
  
  
  Review the Field Definition: Check the data dictionary (transaction SE11) to confirm the field's properties. If it is a key field, you cannot change it directly.
  
  
  Avoid Modifying Key Fields: If you need to change the value of a key field, you typically need to delete the existing record and create a new one with