How To Fix UGMD100 - Field &1 already exists under a different domain

SAP Error Message - Details

• Message type: E = Error

• Message class: UGMD - FIN Master Data: Messages

• Message number: 100

• Message text: Field &1 already exists under a different domain

What causes this issue?

Field &v1& is to be created with data element &v2&. However, this field
already exists and has data element &v3&.

System Response

The system will continue to use the existing data element &v3&; the
change will not be carried out.

How to fix this error?

Check the definition of field &v1& in all applications and areas, and
if necessary, adjust the definitions so they become consistent.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UGMD100 - Field &1 already exists under a different domain ?

  The SAP error message UGMD100, which states "Field &1 already exists under a different domain," typically occurs during the creation or modification of a field in the Data Dictionary (DDIC) when there is a naming conflict with an existing field that has the same name but is associated with a different domain.
  Cause:
  
  Naming Conflict: The field name you are trying to create or modify already exists in the system but is linked to a different domain. In SAP, a domain defines the technical attributes of a field, such as its data type and length.
  Domain Definition: If a field with the same name is defined under a different domain, SAP will not allow you to create another field with the same name, as it could lead to confusion and data integrity issues.
  
  Solution:
  
  Check Existing Fields: Use transaction SE11 (Data Dictionary) to check if the field name already exists. You can search for the field name in the "Fields" section to see if it is already defined under a different domain.
  Rename the Field: If the field name is already in use, consider renaming your new field to something unique that does not conflict with existing fields.
  Review Domain Assignments: If you believe the existing field should be modified, review the domain assignments and see if it is appropriate to change the domain of the existing field instead of creating a new one.
  Consult Documentation: If you are unsure about the implications of changing field names or domains, consult your project documentation or speak with a senior developer or architect.
  
  Related Information:
  
  Transaction Codes: 
  
  SE11: Data Dictionary
  SE80: Object Navigator
  
  
  Domain Management: Understanding how domains work in SAP is crucial. Domains define the technical properties of fields, and conflicts can arise if multiple fields share the same name but have different properties.
  Field Naming Conventions: It is a good practice to follow naming conventions that reduce the likelihood of conflicts, such as prefixing field names with a project-specific identifier.
  
  By following these steps, you should be able to resolve the UGMD100 error and proceed with your development work in SAP.