Data loss after cloning a campaign?

In our recent game we wanted to use some custom sheets i made and copied the game to back it up, after applying the changes we f*cked something up so we wanted to use the backup but the backup was missing most of the stuff from the GM sheets, for whatever reason. Is this a known issue that copying games doesnt work as it should?

Can you provide more detail on what was missing in the copy?  Also, when it was added relative to the copy? Additionally, did you try the rollback feature? (Game Details page -> Settings -> Roll Back Game)

1 player character (out of 3) was missing some attributes and the GM lost all of his sheets. The process how we did it was a bit of a mess afterwards but essentialy: We used DH 2e advanced sheets in our last session that we played After that session we switched custom sheets i created, we knew there would be data loss at this point since i used new attribute names for most names We all filled in the new values into the new sheets, and GM updated all of his mob sheets, everything fine so far Today i did a few additions to the sheets (nothing remotely connected that could have caused this) and we cloned the game to have a backup After doing changed to the orignal sheet (uploading new custom html, js etc) we might have fucked something up at some point so we went to check on the backup To our suprise the backup was missing all of the mentioned data, some of one player chars and all of GMs mob sheets data were gone Old attributes still seemed to be present tho when we reverted from custom sheets to DH2e advanced again on the clone and original I guess we could have done something wrong with the orignal campaing but no idea why the cloned one was missing all the data that was present last week. Didnt try rollback yet

Had you verified the clone was correct after making it?  I'm just wondering if the clone failed to be created properly, or got corrupted afterwards.

No we didnt verify the clone so it was almost surely messed up from the get go