How To Fix SDDL_PARSER_MSG302 - ON condition in to-parent association must contain a key field

SDDL_PARSER_MSG302 - Overview

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 302

• Message text: ON condition in to-parent association must contain 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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

SDDL_PARSER_MSG302 - Details

• The SAP error message SDDL_PARSER_MSG302 indicates that there is an issue with the definition of a "to-parent" association in your data model. Specifically, it states that the condition for this association must include a key field, which is necessary for the association to function correctly.
  
  Cause:
  The error typically arises in the context of defining associations in the SAP Data Dictionary or when working with Core Data Services (CDS) views. The "to-parent" association is used to link a child entity to its parent entity, and it requires a key field to establish a proper relationship. If the association is defined without a key field, the system cannot determine how to relate the two entities, leading to this error.
  
  Solution:
  To resolve this error, you need to ensure that the "to-parent" association includes a key field. Here are the steps you can take:
  
  
  Identify the Association: Locate the definition of the "to-parent" association in your data