How To Fix R1091 - Grouping & has external number assignment, enter a number

R1091 - Overview

• Message type: E = Error

• Message class: R1 - Business Partner Messages from S_BUPA_GENERAL

• Message number: 091

• Message text: Grouping & has external number assignment, enter a number

What causes this issue?

The business partner needs a key to identify it. This key was not
specified.

System Response

The system issues an error message.

How to fix this error?

Enter a key in the dialog. If it is a background process or an XML
message process, contact your system administrator.

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 R1091 - Grouping & has external number assignment, enter a number ?

  The SAP error message R1091, which states "Grouping & has external number assignment, enter a number," typically occurs when you are trying to create or modify a document (such as a customer or vendor) that is associated with a grouping that has been configured to use external number assignment. This means that the system expects you to provide a specific number for the document instead of allowing the system to generate one automatically.
  
  Cause:
  
  External Number Assignment: The grouping you are working with is set up to require an external number. This is often configured in the master data settings for customers, vendors, or other entities.
  Missing Number: You did not provide a number when trying to create or modify the document, which is required due to the external number assignment setting.
  
  
  Solution:
  To resolve this error, you need to provide a valid external number when creating or modifying the document. Here are the steps