You can temporarily disable all personalizations for all users in the system. Doing so will not delete the personalizations, ...

You can temporarily disable all personalizations for all users in the system. Doing so will not delete the personalizations, but will simply reset all pages to their default state for all users. If you re-enable personalization later, all personalizations will be reapplied. You can also permanently delete all personalizations for all users in the system. Be sure to export any personalizations you might want later before performing this step, as there is no way to recover deleted personalizations later.