How To Fix 5B154 - Relationship &1 is not allowed between object types &2 and &3 ->F1

5B154 - Overview

• Message type: E = Error

• Message class: 5B -

• Message number: 154

• Message text: Relationship &1 is not allowed between object types &2 and &3 ->F1

What causes this issue?

You have selected a relationship between the two object types
which is not allowed according to table 777E.
Please check that you have entered the correct object types
and relationship name.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 5B154 - Relationship &1 is not allowed between object types &2 and &3 ->F1 ?

  The SAP error message 5B154 indicates that there is an invalid relationship being defined between two object types in the system. This error typically arises in the context of SAP's data modeling or object management, where certain relationships are restricted based on the types of objects involved.
  
  Cause:
  The error message "Relationship &1 is not allowed between object types &2 and &3" suggests that:
  
  You are trying to create or maintain a relationship (denoted as &1) between two object types (denoted as &2 and &3) that are not compatible.
  The specific relationship you are attempting to establish is not permitted by the system's configuration or business rules.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Object Types: Verify the object types involved in the relationship. Ensure that you are using the correct object types as per the business requirements.
  
  
  Review Relationship Definitions: Look into the configuration of relationships in the relevant SAP module (e.g.,