Message type: E = Error
Message class:  SDDIC_DDLA_ANNOCHECK - Messages for annotation usage check 
Message number: 010
Message text: Only one enum value allowed for annotation '&1'
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The SAP error message SDDIC_DDLA_ANNOCHECK010 indicates that there is an issue with the annotations in your data model, specifically that only one enumeration value is allowed for a certain annotation, but multiple values have been provided.
Cause: This error typically arises in the context of SAP's ABAP programming or when working with the SAP Gateway and OData services. The specific cause of the error is that an annotation is defined in a way that it expects a single value (for example, a single enumeration), but the code or metadata is providing multiple values. This can happen due to: Incorrect Annotation Definition: The annotation might be defined incorrectly in the metadata or in the ABAP code. Multiple Values Provided: The code might be attempting to assign multiple values to an annotation that only allows one. Version Mismatch: There could be a mismatch between the expected version of the OData service and the actual implementation.
Solution: To resolve this
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SDDIC_DDLA_ANNOCHECK011 Annotation '&1' must be an array type
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SDDIC_DDLA_ANNOCHECK012 Invalid annotation enum value '&1'
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