Page is shown twice and can't be updated

In admin panel i see the same page twice and every update is saved but not shown in frontend.
The site has been migrated to a new server and then updated from version 1.6 to 1.7
Actual version v1.7.42.3 - Admin v1.10.42

@bassi,

• Did you follow the 1.6 to 1.7 upgrade guide?
• Are there any errors in /logs/grav.log?
• Did you clear the cache?

Cache cleared and no errors in log.
I'll take a look at the upgrade guide