Vendors with same VAT registration number found - check required

What causes this issue?

Vendors with the same VAT registration number were found.

System Response

Information message and display of vendors with the same VAT
registration number.

How to fix this error?

Check your entries.
The dialog box that appears displays the vendors with the same VAT
registration number. Using the function "Cancel", you can return to the
screen that called up these vendors. You can then bypass the check
using the function "Continue".
INCLUDE 'CUSTOMIZED_MESSAGE_INFO' OBJECT DOKU ID TX

Error message extract from SAP system. Copyright SAP SE.