How To Fix FDT_CORE388 - Domain values may not be unique (see value table &1 in DDIC)

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_CORE - Formula & Derivation Tool: Core

• Message number: 388

• Message text: Domain values may not be unique (see value table &1 in DDIC)

What causes this issue?

The current data object is bound to a data element in the ABAP
Dictionary (DDIC). The system has determined that the bound data element
is associated with value table &v1&. However, in this table, values may
exist that are formally unique only in combination with another key
field in the table. Since BRFplus cannot use value combinations (tuples)
instead of single values, there is a certain risk that the values
associated with the BRFplus data object may appear as duplicates or that
the expected value description texts are not displayed. . As a
consequence, it may be impossible for a user to decide to which table
entry a particular entry in the value list refers.
Note: This is not an error, but it can lead to unwanted effects and even
to errors in other BRFplus objects using the current data object.

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?

Try to set up a value table where the list of values that you want to
associate with the data object is unique in itself, that is, each value
may only occur once in the table.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_CORE388 - Domain values may not be unique (see value table &1 in DDIC) ?

  The SAP error message FDT_CORE388 indicates that there is an issue with the uniqueness of domain values in the Data Dictionary (DDIC). This error typically arises when you are trying to create or modify a field that is associated with a domain, and the values defined for that domain are not unique.
  Cause:
  
  Non-Unique Domain Values: The domain values defined in the value table (specified in the error message) are not unique. This means that there are duplicate entries in the value table that violate the uniqueness constraint.
  Incorrect Configuration: The configuration of the domain or the associated value table may have been set up incorrectly, leading to duplicate entries.
  Data Integrity Issues: There may be existing data in the system that violates the uniqueness requirement, especially if the domain is being used in multiple places.
  
  Solution:
  
  Check the Value Table: Go to the Data Dictionary (transaction SE11) and check the value table mentioned in the error message. Look for duplicate entries in the value table and remove or correct them to ensure that all entries are unique.
  Modify Domain Definition: If necessary, modify the domain definition to ensure that it adheres to the uniqueness requirement. This may involve changing the value table or adjusting the domain's properties.
  Data Cleanup: If there are existing records in the database that violate the uniqueness constraint, you may need to clean up the data. This could involve deleting or updating records to ensure that they comply with the domain's uniqueness requirement.
  Transport Requests: If the issue arises after a transport, ensure that the transport request does not contain any conflicting changes that could lead to this error.
  
  Related Information:
  
  Transaction SE11: Use this transaction to access the Data Dictionary and check the domain and value table.
  Domain and Data Element: Understand the relationship between domains and data elements in SAP. A domain defines the technical attributes of a field, while a data element defines the semantic attributes.
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or fixes related to this error message.
  Testing: After making changes, test the functionality to ensure that the error does not occur again and that the system behaves as expected.
  
  By following these steps, you should be able to resolve the FDT_CORE388 error and ensure that your domain values are unique as required by the SAP system.