Roll Unit in Item and Service Order Lines - System Option

>Utilities>System Options>Order Entry>Order Entry

Category-Configuration

Type- Can be Global, Assigned or User 

When adding a customer order line, if this option is set to yes, the unit assignment will be kept (SY or SF) for all products (Items and Services) added.  Deselect this option to disable this feature which requires a unit other than the default roll unit.

Leave this option set to yes