How To Fix E2186 - Assignment to check field ambiguous (check proposal)

SAP Error Message - Details

• Message type: E = Error

• Message class: E2 - DE Data Dictionary

• Message number: 186

• Message text: Assignment to check field ambiguous (check proposal)

What causes this issue?

The structure of the foreign key definition is ambiguous. When creating
the foreign key, all the key fields of the check table must be assigned
to the foreign key fields (fields of the table itself to be checked or
possibly those of a foreign table). The assignment is made using the
common domain of the pair of fields.

System Response

The system automatically tries to suggest an assignment.
There are several selection possibilities for the check field in the
primary key of the check table. Therefore it is not possible to make an
assignment to the check field.

How to fix this error?

Please define the field assignment yourself.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message E2186 - Assignment to check field ambiguous (check proposal) ?

  The SAP error message E2186 "Assignment to check field ambiguous (check proposal)" typically occurs in the context of ABAP programming, particularly when dealing with check fields in database tables or structures. This error indicates that there is ambiguity in the assignment of values to check fields, which can arise from various reasons.
  Cause:
  
  Ambiguous Field References: The error often occurs when there are multiple fields with the same name in different contexts (e.g., in different tables or structures) and the system cannot determine which field to use.
  Incorrect Data Element Assignment: If a check field is assigned a data element that is not unique or is incorrectly defined, it can lead to ambiguity.
  Multiple Proposals: When the system tries to propose a value for a check field, it may find multiple valid options, leading to confusion about which one to use.
  
  Solution:
  
  Check Field Definitions: Review the definitions of the fields involved in the assignment. Ensure that there are no duplicate field names in the context where the error occurs.
  Use Fully Qualified Names: When referencing fields, use fully qualified names (e.g., table_name-field_name) to eliminate ambiguity.
  Review Data Elements: Check the data elements assigned to the fields and ensure they are unique and correctly defined.
  Adjust the Code: If the error occurs in custom ABAP code, modify the code to clarify which field should be used. This may involve changing the logic or restructuring the code to avoid ambiguity.
  Debugging: Use the ABAP debugger to trace the execution and identify where the ambiguity arises. This can help pinpoint the exact location in the code or data structure causing the issue.
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP ABAP documentation for guidelines on field definitions and data element assignments.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other developers who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the E2186 error and clarify the assignment to the check field in your SAP environment.