Support intro
Sorry to hear you’re facing problems 
help.nextcloud.com is for home/non-enterprise users. If you’re running a business, paid support can be accessed via portal.nextcloud.com where we can ensure your business keeps running smoothly.
In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version ( 13 -15):
Operating system and version _:
Apache or nginx version:
PHP version (eg, 7.1):
The issue you are facing:
Hi all! Nextcloud upgrade question: I have an NC13 install. The NC upgrader does not work and I do not have sudo rights for the server, so I installed a new instance -NC15 -via the cpanel Installatron app. I tested (Notes only) with my old laptop by adding a new account to the NC settings. Notes synced to my new NC15. Hopefully if I add the NC15 account to my newer laptops and phone all data should sync. My question is though; if I delete my NC13 will this affect the NC15 account?? Can I upgrade/transiton from NC13 - 15 this way or is there a better procedure? Thanks!
Is this the first time you’ve seen this error? (Y/N): y
Steps to replicate it:
The output of your Nextcloud log in Admin > Logging:
PASTE HERE
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
PASTE HERE
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE