Supplier Site association using FBDI tab "EGO_ITEM_ASSOCIATIONS_INTF" resulted an unexpected error.

In the template all details provided

Transaction Type - create

Batch ID

Item Number

Organization code

Source system code

Primary flag - Y

Supplier Name, Supplier Number, Supplier Address Name

The import process resulted in error that says "null, CONTEXT_CODE - You must provide a value for the attribute group that is associated at the item revision level."

Can anyone please explain what is this error.