Webflow has a built in backup and restore system for your projects.
In a pinch, it can help you out of sticky situations, but before you restore a project, make certain you are aware of the limitations.
On a restore, all of your CMS Item ID's will be changed. If you have an external integration that relies on them, this can be a significant issue to resync your external system with your site.
I haven't experienced this however one forum report indicates;
https://discourse.webflow.com/t/urgent-missing-access-groups/274125/3?u=memetican
Use cases;
Questions;