Destiny 2 was forced offline for 20 hours after Bungie issued a faulty patch that caused issues for players. Bungie issued a regular game patch to tweak Destiny 2’s sandbox on Tuesday, but many players quickly realized the game had deleted certain triumphs, seals, and catalysts. Bungie has now issued a fix that involved rolling back its servers.

Bungie brought Destiny 2 offline to investigate the issue at 2PM ET on Tuesday, two hours after the patch was first released. After hours of testing and investigation, Bungie confirmed it will be “rolling back all player accounts to their state as of 8:20AM PST.”

That’s 40 minutes before the patch, meaning any progress just before the patch and two hours after will be lost. Players that earned loot by completing weekly raids, dungeons, bounties, and other content will need to replay the activities once servers are back online.

Destiny 2 servers are now back online. Bungie has issued a 6.3.0.6 patch that it says has “resolved the issue causing progression loss for certain Triumphs, Seals, and Catalysts.”

Destiny 2 is a popular looter shooter from Bungie that has around 800,000 players logging in each day across PC, Xbox, and PlayStation. This major outage comes just over a month before Bungie releases its next major Destiny 2: Lightfall expansion.

Update January 25th, 9:50AM ET: Article updated with more information from Bungie.

Update January 25th, 10:02AM ET: Article updated to note Destiny 2 servers are now back online.