Another player shared the 10th goal in post 199:
To me, this sounds like the Princess will stay asleep on the slab until you complete the final step of this goal. If you don't want her walking around, you can simply stop the event at this step. However, in order to have a chance for the Trade Tickets to drop from the item, you have to upgrade it fully to Level 10 so it's a choice of which you prefer.