Two different things use these words, which is why the labels sometimes seem to disagree. Draft is a booking stage in your pipeline — the booking exists and no contract has been issued. Tentative is the status of the calendar event, shown in yellow, and it's driven by your settings rather than by the pipeline.
So a booking can sit at one stage while its calendar event shows another. Neither is wrong.
What moves an event to Confirmed
Go to Settings > Calendar and Events > Event Publishing.
Look at the Confirmed trigger. It can be set to contract issued, contract signed, or deposit paid.
Whichever you pick, events flip from Tentative to Confirmed automatically when that happens.
If your events are confirming earlier or later than you expect, this setting is where to change it. It applies across your account, so agree it with your team first.
How to change a booking back to draft
Check whether a contract has gone out before you do anything.
No contract sent yet. Open the calendar event, go to its Basic tab, and set the status back. You can override any event's status there.
Contract sent but not signed. Retract the contract from the Contract tab first, then revert the status in the event's Basic tab.
Contract fully executed. Reverting isn't something you can do yourself once both parties have signed. Start a chat from the messenger, tell us which booking it is and what state you want it in, and we'll sort it out.
Good to know
Overriding an event's status in the Basic tab is manual and sticks. If the Event Publishing trigger later fires for that booking, check the status is still what you want.
Changing the calendar status doesn't retract a contract or void an invoice. Those are separate actions, and a booking showing Draft can still have live documents attached to it.