How To Fix DI755 - Field &-& is checked against multiple key fields using join condition

SAP Error Message - Details

• Message type: E = Error

• Message class: DI - Dictionary messages: Indexes

• Message number: 755

• Message text: Field &-& is checked against multiple key fields using join condition

What causes this issue?

Every secondary table of a lock object must be connected to a base
table above it in the hierarchy by a join condition. This join
condition must be implemented by a foreign key. This foreign key must
have the secondary table as foreign key table and the base table above
it in the hierarchy as check table. No base table field may be checked
against several different key fields by the join condition (as foreign
key field).
The base table field named does not conform to this requirement.

System Response

The action is cancelled.

How to fix this error?

Construct the hierarchy of the lock object correctly. Observe the
<DS:TX.DDDOK_ENQU_REQUIREMENTS>requirements for the join conditions of
a lock object </>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DI755 - Field &-& is checked against multiple key fields using join condition ?

  The SAP error message DI755 indicates that there is an issue with a data inconsistency or a problem with the join condition in a data model or query. This error typically arises when a field is being checked against multiple key fields, which can lead to ambiguity in the data retrieval process.
  Cause:
  
  Multiple Key Fields: The error occurs when a field is being validated against multiple key fields in a join condition. This can happen if the data model or query is not properly defined, leading to confusion about which key field should be used for the validation.
  Data Model Issues: There may be issues in the underlying data model, such as incorrect relationships or joins between tables.
  Query Design: If you are using a query or report that involves multiple tables, the join conditions may not be set up correctly, leading to this error.
  
  Solution:
  
  Review Join Conditions: Check the join conditions in your data model or query. Ensure that each field is being checked against the correct key field and that there are no unnecessary joins that could lead to ambiguity.
  Simplify the Query: If possible, simplify the query to reduce the number of joins or conditions. This can help clarify the relationships between the fields and eliminate the error.
  Data Model Validation: Validate the data model to ensure that all relationships and keys are correctly defined. This may involve checking the primary and foreign keys in the database tables.
  Consult Documentation: Refer to SAP documentation or help resources for guidance on how to properly set up joins and key fields in your specific context.
  Testing: After making changes, test the query or data model to ensure that the error is resolved and that the data is being retrieved correctly.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message. SAP frequently releases updates that may address known issues.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed. Other users may have encountered the same error and can provide insights or solutions.
  SAP Support: If the issue persists, consider reaching out to SAP support for assistance. They can provide more detailed troubleshooting based on your specific system configuration and data model.
  
  By following these steps, you should be able to identify the cause of the DI755 error and implement a solution to resolve it.