Hi,

Thanks for contacting us. Yes you can upgrade it but make sure you have backup before doing any changes.

-Regards.

Hi. My back end crashed after the update 4.2.2. It was the same in the previous update 4.2.1. Is there any way to fix this?

![]https://shared-assets.adobe.com/link/6368d423-57eb-459d-6219-41b3e636d76f

Please create a new forum post about your this issue.