How To Fix SEPM_EXCEPTIONS052 - Field '&1' is not a key field

SAP Error Message - Details

• Message type: E = Error

• Message class: SEPM_EXCEPTIONS - EPM: Exception Messages

• Message number: 052

• Message text: Field '&1' is not a key field

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SEPM_EXCEPTIONS052 - Field '&1' is not a key field ?

  The SAP error message SEPM_EXCEPTIONS052, which states "Field '&1' is not a key field," typically occurs in the context of SAP's data modeling or when working with the SAP HANA database. This error indicates that a field you are trying to use as a key field in a data model or a query is not defined as a key field in the underlying data structure.
  
  Cause:
  
  Field Definition: The field you are trying to use is not defined as a key field in the database table or data model. Key fields are essential for uniquely identifying records in a table.
  Data Model Configuration: If you are working with a data model (like an InfoObject in BW or a CDS view), the field may not be included in the key fields of that model.
  Query Design: In query design, if you attempt to use a non-key field in a context that requires a key field