How To Fix BG027 - Only internal numbers allowed

BG027 - Overview

• Message type: E = Error

• Message class: BG - Warranty processing

• Message number: 027

• Message text: Only internal numbers allowed

What causes this issue?

Only internal number assignment is allowed for the warranty number
entered.

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?

Error message extract from SAP system. Copyright SAP SE.

BG027 - Details

• The SAP error message BG027: Only internal numbers allowed typically occurs in the context of business partner or customer/vendor master data management. This error indicates that the system is expecting an internal number assignment for a business partner or master data record, but an external number or an invalid format has been provided instead.
  
  Cause:
  
  External Number Assignment: The system is configured to use internal number assignment for business partners, but an external number was entered.
  Configuration Settings: The settings in the system may be configured to only allow internal numbers for certain types of records.
  Data Entry Error: Users may have mistakenly entered an external number when the system is set to accept only internal numbers.
  
  
  Solution:
  
  
  Check Number Assignment Configuration:
  
  Go to the configuration settings for business partner or customer/vendor master data.
  Ensure that the number assignment is set to "Internal" for the relevant business partner type.
  
  
  
  Use Internal Number:
  
  If you are trying to create or modify