How To Fix /IWBEP/CM_V4_MED136 - RefConstr: Non-null NavProp '&1' ('&2'): Invalid nullable for princ/depnt

/IWBEP/CM_V4_MED136 - Overview

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 136

• Message text: RefConstr: Non-null NavProp '&1' ('&2'): Invalid nullable for princ/depnt

Self-Explanatory Message

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/IWBEP/CM_V4_MED136 - Details

• The SAP error message /IWBEP/CM_V4_MED136 RefConstr: Non-null NavProp '&1' ('&2'): Invalid nullable for princ/depnt typically occurs in the context of OData services when there is an issue with the navigation properties defined in the data model. This error indicates that there is a problem with the cardinality or nullability of the navigation properties between entities in your OData service.
  
  Cause:
  
  
  Navigation Property Configuration: The error suggests that there is a navigation property that is expected to be non-null (i.e., it must always have a value) but is defined in a way that allows it to be nullable. This can happen if the relationship between the principal (parent) and dependent (child) entities is not correctly defined.
  
  
  Cardinality Mismatch: The cardinality defined in the data model (e.g., one-to-many, many-to-one) may not match the actual data or the way the entities are related. For example, if a principal entity is expected to have a mandatory relationship