How To Fix SA491 - Enter a cardinality appropriate for the relationship category

SAP Error Message - Details

• Message type: E = Error

• Message class: SA -

• Message number: 491

• Message text: Enter a cardinality appropriate for the relationship category

What happened?

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

System activities

What to do next

Only cardinalities 1:C and 1:SP are allowed with relationship
type S.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SA491 - Enter a cardinality appropriate for the relationship category ?

  The SAP error message SA491, which states "Enter a cardinality appropriate for the relationship category," typically occurs in the context of defining relationships in the SAP system, particularly in the area of data modeling or when working with master data.
  
  Cause:
  This error arises when the cardinality defined for a relationship does not match the expected values based on the relationship category. Cardinality refers to the numerical relationship between two entities, such as one-to-one, one-to-many, or many-to-many. The relationship category dictates what kind of cardinality is permissible. For example:
  
  If the relationship category is "one-to-many," you cannot set the cardinality to "many-to-many."
  If the relationship category is "one-to-one," you cannot set it to "one-to-many."
  
  
  Solution:
  To resolve the SA491 error, follow these steps:
  
  
  Check Relationship Category: Review the relationship category you are working with. Understand the expected cardinality for that category.
  
  
  Adjust Cardinality: Modify the cardinality setting to align with the relationship category. Ensure that the cardinality you