How To Fix SDDL_PARSER_MSG258 - Child entity "&1" does not contain a key field

SDDL_PARSER_MSG258 - Overview

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 258

• Message text: Child entity "&1" does not contain a key field

Self-Explanatory Message

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SDDL_PARSER_MSG258 - Details

• The SAP error message SDDL_PARSER_MSG258 indicates that there is an issue with a child entity in a data model or service definition where the child entity does not contain a key field. This is a common issue when working with OData services or data models in SAP, particularly when defining relationships between entities.
  
  Cause:
  The error occurs because:
  
  Missing Key Field: The child entity is expected to have a key field defined, which is necessary for uniquely identifying records in that entity. Without a key field, the system cannot establish a proper relationship with the parent entity.
  Incorrect Entity Definition: The entity might not be defined correctly in the data model or service definition, leading to the absence of a key field.
  Modeling Error: There might be a modeling error where the child entity is not properly configured to reflect its relationship with the parent entity.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check