Item Association load through FBDI is getting error out

Hi All ,

I am trying to load the item master data using FBDI but item association file is getting error out saying supplier or supplier site is not Valid.

As per my understanding it is required to link the supplier org and i dont want to add it as its not mandatory, please let me know if am doing anything wrong.

Error Examples:

10000136(null) :
Supplier Name : , Address Name : , SUPPLIER_ID,SUPPLIER_SITE_ID - Supplier or Supplier Site is invalid.
10001051(null) :
Supplier Name : , Address Name : , SUPPLIER_ID,SUPPLIER_SITE_ID - Supplier or Supplier Site is invalid.
10001366(null) :