Prevent 1.x users from upgrading to core >=8.9.x
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3124982. -->
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>
issue