Message type: E = Error
Message class: DDACT - Messages for Activating Dictionary Objects
Message number: 026
Message text: The field & must be a key field
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DDACT026
- The field & must be a key field ?The SAP error message DDACT026, which states "The field & must be a key field," typically occurs in the context of data dictionary objects, particularly when defining or modifying database tables or views in the ABAP Dictionary (SE11). This error indicates that a field that is expected to be a key field is not defined as such.
Cause: Field Definition: The field in question is not marked as a key field in the table or view definition, but it is required to be a key field for the operation you are trying to perform. Data Model Constraints: The data model or business logic may require that certain fields be unique identifiers (key fields) for the records in the table. Inconsistent Configuration: There may be inconsistencies in the configuration of the data model, where the field is expected to be a key but is not defined as one.
Solution: Check Field Definition: Go to transaction SE11 (Data Dictionary). Open
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