How To Fix /IWBEP/SBOD009 - Invalid left cardinality '&1' specified

/IWBEP/SBOD009 - Overview

• Message type: E = Error

• Message class: /IWBEP/SBOD -

• Message number: 009

• Message text: Invalid left cardinality '&1' specified

Self-Explanatory Message

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/IWBEP/SBOD009 - Details

• The SAP error message /IWBEP/SBOD009 Invalid left cardinality '&1' specified typically occurs in the context of SAP Gateway and OData services. This error is related to the definition of associations in the data model, particularly when defining the cardinality of relationships between entities.
  
  Cause:
  The error indicates that there is an issue with the cardinality specified for an association in your OData service. Cardinality defines the number of instances of one entity that can be associated with instances of another entity. The left cardinality refers to the number of instances on the left side of the association.
  Common causes for this error include:
  
  Incorrect Cardinality Definition: The cardinality defined in the data model does not conform to the expected values. For example, it might be defined as "0..1" when it should be "1..1" or vice versa.
  Model Inconsistencies: There may be inconsistencies in the way entities are defined or related to each other in the