How To Fix CRM_1O_SCI_RT008 - Extension IST_ITEM_EXTENSION is not assigned to item object type &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CRM_1O_SCI_RT - messages from iterface OneOrder <-> Solution Configurator

• Message number: 008

• Message text: Extension IST_ITEM_EXTENSION is not assigned to item object type &1

What causes this issue?

You have created an item with item object type &SYST-MSGV1&. This item
is relevant for Solution Configurator - that means that the item
hierarchy (of which this item is a part) is controlled by the Solution
Configurator.
If an item is controlled by the Solution Configurator, it is necessary
to store additional information that is derived from the Solution
Configurator, for example, if the item is defined as mandatory by the
Solution Configurator and therefore cannot be deleted. This additional
data is stored in a data extension named 'IST_ITEM_EXTENSION'. This
extension is not assigned to the item object type &SYST-MSGV1&.

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?

If the items of item object type &SYST-MSGV1& should be Solution
Configurator relevant, you should assign the data extension
'IST_ITEM_EXTENSION' to item object type &SYST-MSGV1& in table
'CRMC_OBJ_ASSI_I'.
If the items of item object type &SYST-MSGV1& should NOT be Solution
Configurator relevant, you should remove the Solution Configurator
relevancy in the item category attributes.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CRM_1O_SCI_RT008 - Extension IST_ITEM_EXTENSION is not assigned to item object type &1 ?

  The SAP error message CRM_1O_SCI_RT008 indicates that the extension IST_ITEM_EXTENSION is not assigned to the specified item object type in the SAP CRM system. This error typically arises when there is a mismatch or misconfiguration in the assignment of extensions to object types in the CRM system.
  
  Cause:
  
  Missing Assignment: The extension IST_ITEM_EXTENSION has not been assigned to the specified item object type (denoted by &1 in the error message).
  
  Configuration Issues: There may be issues in the configuration settings where the extension should be linked to the item object type.
  Transport Issues: If the system has recently undergone a transport of changes, the assignment may not have been included or properly activated in the target system.
  
  
  Solution:
  
  
  Check Extension Assignment:
  
  Go to the transaction code CRMD_ORDER or CRMD_ORDERADM_H to check the configuration of the item object type.
  Navigate to the relevant customizing settings in the SAP IMG (Implementation Guide) under:Customer Relationship Management -> Basic Functions -> Customizing