Delivery costs & & will be apportioned

What causes this issue?

You have chosen the function <LS>Simulate</> in order to view all the
posting lines or you have choosen <LS>Post</>.
The delivery costs will now be automatically apportioned to the
relevant items.

How to fix this error?

Acknowledge the message with ENTER to continue processing.

Error message extract from SAP system. Copyright SAP SE.