How To Fix MC730 - Join from & to & not defined with foreign key

MC730 - Overview

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 730

• Message text: Join from & to & not defined with foreign key

What causes this issue?

Two tables which are not linked with a foreign key were included in a
view. Therefore no join condition is defined between these tables.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

This special case is currently permitted only in exceptions and is not
supported by the ABAP/4 Dictionary.
In any case you should make sure that a join condition is defined with
the selection condition.

Error message extract from SAP system. Copyright SAP SE.

MC730 - Details

• The SAP error message MC730 ("Join from & to & not defined with foreign key") typically occurs in the context of SAP's Material Management (MM) or other modules that involve data retrieval from multiple tables. This error indicates that there is an attempt to join two database tables, but the foreign key relationship that is expected to exist between them is not defined in the system.
  
  Cause:
  
  
  Missing Foreign Key Definition: The most common cause of this error is that the foreign key relationship between the two tables has not been defined in the database schema. This can happen if the data model has been customized or if there are inconsistencies in the data model.
  
  
  Incorrect Table Configuration: Sometimes, the configuration of the tables may not align with the expected relationships, leading to this error when trying to execute a query or report that involves those tables.
  
  
  Data Model Changes: If there have been