Error- Value cannot be changed for supplier name

Hi there,
I’m on my local machine.
trying to create a purchase receipt with 5 serial numbers. It saves the document easily but cann’t be submitted. it shows me that “Value cannot be changed for supplier name” .

but i didnt even touched any doctype or custom script for supplier.

Is there anyone to help me please.
Thank You.

@Rahat_Mahmud Is there a custom script running over the Purchase Receipt? Could you share the same if any

Thanks for your attention…

i Didnt used any custom script.