How To Fix E2185 - Assignment to check field is unique and cannot be changed

SAP Error Message - Details

• Message type: E = Error

• Message class: E2 - DE Data Dictionary

• Message number: 185

• Message text: Assignment to check field is unique and cannot 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 E2185 - Assignment to check field is unique and cannot be changed ?

  The SAP error message E2185, "Assignment to check field is unique and cannot be changed," typically occurs in the context of data validation or assignment in SAP systems, particularly when dealing with check fields in database tables or structures. This error indicates that an attempt was made to change a field that is defined as unique, meaning that it must maintain distinct values across records.
  Cause:
  
  Unique Constraint Violation: The field you are trying to modify is defined as unique in the database schema. This means that no two records can have the same value for this field.
  Data Integrity Rules: The system enforces data integrity rules that prevent changes to fields that are part of a unique constraint.
  Incorrect Logic in ABAP Code: If you are working with custom ABAP code, there may be logic that attempts to assign a value to a unique field incorrectly.
  
  Solution:
  
  Check Field Values: Ensure that the value you are trying to assign to the field does not already exist in the database. If it does, you will need to choose a different value that maintains uniqueness.
  Review Data Model: If you are working with a custom table or structure, review the definition of the table to understand which fields are marked as unique and why.
  Modify ABAP Code: If the error arises from custom ABAP code, review the logic to ensure that it does not attempt to change unique fields inappropriately. You may need to implement checks before assignments.
  Consult Documentation: Refer to SAP documentation or the data model documentation for the specific module you are working with to understand the constraints and requirements for the fields involved.
  Database Constraints: If necessary, consult with a database administrator to review the constraints on the database level and ensure they align with your business requirements.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or updates related to this error message.
  Transaction Codes: Use transaction codes like SE11 (Data Dictionary) to inspect the table definitions and constraints.
  Debugging: If you are a developer, consider using the debugger to trace the execution of the code that leads to this error to identify the exact point of failure.
  User Authorization: Ensure that the user has the necessary authorizations to make changes to the records in question.
  
  By following these steps, you should be able to identify the cause of the E2185 error and implement a suitable solution.