Steps to reproduce the issue

Got Information for Update to: Joomla Patchtester 4.0.0-rc3

Expected result

Update was successful, but error message:

Actual result

An error has occurred. 1146 Table 'xyz_patchtester_pulls_labels' doesn't exist

System information (as much as possible)

Joomla CMS
Joomla! 4 Content Management System.
Site
File
No Problems
4.0.0-2020-05-29
‎4.0.0-beta4-dev
Joomla! Patch Tester
Component for pull request management testing
Administrator
Component
No Problems
4.0.0
‎4.0.0-rc3

Additional comments

It's not possible to use Patchtester now.

But I think, found the reason for: https://github.com/joomla-extensions/patchtester/releases:

Update warning

Any previous installation of the Joomla! Patch Tester must be uninstalled as this release contains some major changes due to the addition of showing Github labels.

Prior to uninstalling you may want to make a backup of your Github token so it is easy to restore it.

But why is there no "Pre-warning"?
Will try to install completely new.