Error in Submit on Purchase Invoice

Getting an error after Submit a Purchase Invoice
“Please set default Asset Received But Not Billed in Company DK Exports”

How to make sure that this error will not occur again?

You need to setup default account for “Asset Received But Not Billed”
check ur Company Setting - Fixed Asset Defaults

Thanks, the Problem has been Solved

but why it is mandatory since we are not making any transaction related to the asset?