How To Fix MEPO166 - Conf. Control Key lacks; delivery creation for item &1 not possible

MEPO166 - Overview

• Message type: E = Error

• Message class: MEPO - New Purchase Order Dialog

• Message number: 166

• Message text: Conf. Control Key lacks; delivery creation for item &1 not possible

What causes this issue?

No confirmation control key was selected for the purchase order item.
Therefore no inbound delivery document can be created for the purchase
order item and an inbound delivery cannot take place.
The purchasing document is assigned to a document type with control key,
which determines, that the purchasing document and the corresponding
inbound delivery is transferred to SAP TM.

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?

Select a confirmation control key which allows an inbound delivery
creation.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

MEPO166 - Details

• The SAP error message MEPO166 indicates that there is a problem with the configuration control key for a specific item in a purchasing document (like a purchase order or a contract). This error typically arises when the system cannot create a delivery for the specified item because the control key is missing or not properly configured.
  
  Cause:
  
  Missing Control Key: The control key for the item is not defined in the system. This key is essential for determining how the item should be processed in terms of delivery and other logistics functions.
  Incorrect Configuration: The control key may be incorrectly configured or not assigned to the item type in the system.
  Item Type Restrictions: The item type may not allow for delivery creation due to its settings or the way it is defined in the system.
  Master Data Issues: The material master or vendor master data may not have the necessary settings or information related