Item Sourcing Rules

 Hello,

one of our organization default requisition type is internal in iProcurement and ı want to change it to vendor.

On the item properties ı change item source type "NULL" to "Vendor", then i make an requisition from iProcurement and the source type comes Inventory again.

Then ı open item sourcing rules screen and delete the related line which is used for my organization. This time my requisition default source type come as vendor as ı need.

But when i chose another item which sourcing type is null on item properties, new request's default source type again comes as Vendor and ı dont want to do this.