No warning except for an error if the are not equal on all of the selected orders.

Warning

A warning displays a list of fields that are not equal on all the selected orders, but which should be equal, according to the Summary update parameters. A dialog box with the option of proceeding by selecting Yesor Nowill appear. If you select Yes, the orders will be posted. To proceed without this warning, change the fields mentioned in the error message, or exclude the orders that are different.

Error

An error message displays a list of fields that are not equal on all of the selected orders, but which should be equal, according to the summary update parameters. It is not possible to proceed from here. To proceed, change the fields mentioned in the error message, or exclude the orders that are different.