Upgradation guideline

I want to upgrade from v1.2.20 to v1.2.27. I’ve searched for guideline but not found it. Can somebody help?

Thats like saying, you want to add a turbo to your car. How do I do it?

What car? Which model? What year? Which engine? Etc, etc…

this is the answer you get with no information:
Peek 2023-03-30 21-07

Or moree simple:
Installation instructions
Upgrade to a new version

But as creecros tells: There are many differences between the Installations with impact on how to update. Info from your User Profile → Settings /<…/?controller=ConfigController&action=index) like

Konfiguration

Version: 1.2.26
PHP Version: 7.4.33
PHP SAPI: fpm-fcgi
HTTP-Client: cURL
OS Version: Linux 5.4.0-144-generic
Datenbanktreiber: mysql
Datenbank Version: 10.5.19-MariaDB-1:10.5.19+maria~ubu2004-log
Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Firefox/91.0

would help to give some advice to you.

For my KANBOARD installations at my webspace hoster all-inkl I do (different to instructions on github):

safety first

1.with filezilla I copy paste complete installation from WEB server to my HDD as a backup
2. Do a database backup follwiig all-inkl instructions
3. at Web installation I rename folders app, assets, libs (you never know …)

Installation

  1. Download / unzip latest versions
  2. Upload folders app, assets, libs to WEB server installation using filezilla

ready!

After few days of testing I delete the renamed folders app, assets, libs on WEB installation.