Tried adding a master to my project, everything has been deleted

Hello!

I have a two master glyphs project. I was about to start sketching some italics and tried to duplicate by alt-dragging the existing masters. I accidentally cmd-dragged them and all of the info was cleared, along with all of the characters. Quite interesting. I don’t have a backup and I can’t revert the file, but I opened the Glyphs file in Sublime Text and the information IS there still.

Could I ask for some help with how to identify the issue and regain access to the data that appears to be stored in the file?

Thank you!
Kia

Can send me the file?

Sent! Thanks Georg.

Not sure if it helps, but noticed this pop up on the metrics labels after tabbing through them.

What version of Glyphs and of MacOS do you have?

Glyphs 3.3.1 (3343)
MacOS 14.6.1 (23G93)