San Diego Comic-Con, the largest fan convention in the United States, has officially been cancelled amid concerns about the ongoing coronavirus outbreak, Comic-Con International announced Friday.

The cancellation marks the first time in SDCC’s 50-year history that the event will not take place. The convention will instead resume at the San Diego Convention Center from July 22-25, 2021.

SDCC also announced that individuals who purchased badges for Comic-Con 2020 will have the option to request a refund or transfer their badges to Comic-Con 2021. All 2020 badge holders will receive an email within the next week with instructions on how to request a refund. Comic-Con’s official hotel affiliate, onPeak, will be cancelling all hotel reservations and refunding all deposits made through them.

“Extraordinary times require extraordinary measures and while we are saddened to take this action, we know it is the right decision,” said SDCC spokesman David Glanzer. “We eagerly look forward to the time when we can all meet again and share in the community we all love and enjoy.”

The organization has also cancelled the fan convention WonderCon, after initially postponing it in March. The next WonderCon will be held from March 26-28, 2021. Coronavirus Interrupts TV: Which Seasons Will Be Shortened?

San Diego Comic-Con holds the Guinness World Record for being the largest annual pop culture festival in the world, with last year’s event drawing an estimated 135,000 attendees from more than 80 countries, as well as more than 2,500 media personnel from more than 30 countries. California Gov. Gavin Newsom, however, issued a statewide stay-at-home order in response to the pandemic on March 19, which is not expected to be lifted anytime soon.

Earlier this month, Comic-Con International said it remained “hopeful” that SDCC could still take place in 2020. “We understand how difficult the current climate has been for all of us and appreciate your continued support through these trying times,” the organization said at the time.