How To Fix UD336 - Cardinality C (& not allowed here)

UD336 - Overview

• Message type: E = Error

• Message class: UD - EDM - Enterprise Data Model

• Message number: 336

• Message text: Cardinality C (& not allowed here)

What causes this issue?

You selected "C" as the left side of the cardinality for a hierarchical
relationship. This is incorrect because there has to be a referenced
entity for each dependent entity in hierarchical relationships.

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?

First check the type and cardinality of the relationships again and
make the necessary changes.

Error message extract from SAP system. Copyright SAP SE.

UD336 - Details

• The SAP error message UD336, which states "Cardinality C (& not allowed here)," typically occurs in the context of SAP Business Workflow or when dealing with data modeling in SAP systems. This error indicates that there is a cardinality issue in the data model or workflow definition, specifically related to the use of a cardinality constraint that is not permitted in the given context.
  
  Cause:
  
  Cardinality Constraints: The error arises when a cardinality constraint (like "C" for "Conditional") is applied in a situation where it is not allowed. For example, if you are trying to define a relationship between entities or objects in a way that does not conform to the expected cardinality rules.
  Modeling Errors: It can also occur due to incorrect modeling in the workflow or data structure, where the relationships between objects are not properly defined.
  Incompatible Object Types: The error may also be triggered if you are trying to use