We will soon shut down (beginning of 2020) GitBook legacy meaning that you need to migrate your content to GitBook v2.
Starting the migration process has no consequences until you confirm the migration. This allows you to experiment the new version and check that everything is right, before moving on definitively. You can migrate your organization(s) to the new version by clicking on upgrade now! in the banner of your account settings.
Either way, you will be asked to follow the different migration steps.
After finishing this process, you will be able to experiment with your imported organization, before confirming the migration definitively. You must wait 24 hours before confirming the migration.
We are happy to help and answer your questions, just contact our support team! 😊