How To Fix UX289 - External number must be entered for internal number assignment

UX289 - Overview

• Message type: E = Error

• Message class: UX - TR: Business Partner and Loan Conversion

• Message number: 289

• Message text: External number must be entered for internal number assignment

What causes this issue?

You want to transfer a record designated for internal number
assignment. No value was transferred for the field EXTPARTNR. This
means that there would be no way of finding this record in the system,
since the link to the external number that is known by the user would
be missing.

System Response

The transfer is rejected.

How to fix this error?

Transfer the external number for this record.

Error message extract from SAP system. Copyright SAP SE.

UX289 - Details

• The SAP error message UX289, which states "External number must be entered for internal number assignment," typically occurs when you are trying to create or manage an object in SAP that requires an external number assignment, but the system is expecting an internal number assignment instead. This can happen in various contexts, such as when creating documents, master data, or other entities that have specific number assignment configurations.
  
  Cause:
  
  Number Range Configuration: The error often arises due to the configuration of number ranges in the system. If the object you are trying to create is set to use an external number range, you must provide an external number. If you do not provide one, or if the system is set to use an internal number range, this error will occur.
  Incorrect Settings: The settings in the transaction or the configuration of the number range may not align with what you are trying to