Prevent 1.x users from upgrading to core >=8.9.x
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3131056. -->
Reported by: [dpi](https://www.drupal.org/user/81431)
>>>
<p>Prevent 1.x branch from being installed on 8.9 or later. These sites should use 2.x branch</p>
> Related issue: [Issue #3124982](https://www.drupal.org/node/3124982)
> Related issue: [Issue #3093126](https://www.drupal.org/node/3093126)
issue