There are 3 different kind of tanning packages, Minutes, Sessions, and Memberships. When you create a Tanning package, it is imperative that you choose an item type that matches the kind of package you are creating.
A minute package will put minutes on the customers account. A Session package will put sessions on the customers account. And a Membership package will put an tanning expiration date on the customers account. The number of minutes, sessions, or days of the membership are determined in the Tanning Package Inventory. However, the Item type selected must match the Inventory or Pack Type.
Remember, the Item Type must be unique throughout the system. There are item types for sales, rentals, etc., and it must be different from those item types as well.