The No linked tickets warning means HeySummit cannot find an active ticket that gives attendees access to that session. You may see it when all available tickets exclude the session, point to different sessions or categories, cover different event days, or are unavailable for checkout.
Check the ticket's access
Go to Content & Schedule > Sessions and identify the session showing No linked tickets.
Go to Ticketing & Payments > Tickets, Add-ons & Donations, then open the Tickets tab.
Open the relevant ticket's (...) menu and select Manage Ticket.
Open Access. Check that the ticket includes the required content type, then review any limits for specific days, sessions or categories and any excluded sessions or categories.
Save the ticket. Across your active tickets, every attendee-facing session should be covered by at least one ticket.
Return to Content & Schedule > Sessions. The warning should clear once an active, checkout-available ticket gives access to the session. For the wider setup workflow, see Setting Up Tickets For Your Event.