Post installation

I've seen two cases where the HTML of a site will have something like this:

<meta name="generator" content="Drupal 9" />
...
<meta name="Generator" content="Drupal 10 (https://www.drupal.org)" />

I'm not asking how to set that up. I'm just (out of idle curiosity) wondering if others have seen something like it.

Hey everyone. I did do a search for this but the results I found were either for Drupal 7 or had links to articles here and elsewhere that 404d, so I'm asking for those with D8 and later who need a similar solution:

I've followed this article to reset my admin password in phpmyadmin using the password generated from drupal itself in:

php core/scripts/password-hash.sh 'newpasswd'

I then ran the update query with:

This was poor planning on my part, but I need to ask for help in fixing it.

After creating a field, and naming it, I realized that I need to use a different field type. But the field name (machine name) is now unavailable.

For example, I first created a field called subtotal. Then I backtracked and deleted that field from my content type, and created a new field to do the same thing. But now I have to call it sub-total. 

https://testing.knut-krueger.de/en/

Two questions:
1. Where did I enter that there are "Vorname" and "Nachname" fields? I can no longer find it and I can't find any untranslated strings

They are used here in the following database fields:

Groups
 simplenews_subscriber
 simplenews_subscriber
 simplenews_subscriber__field_last_name
 simplenews_subscriber__field_first_name
 simplenews_subscriber__subscriptions

I cannot, despite a lot of effort, find any settings for the comment user name. I have looked through all possible pages in comment types, even in content types, even in configuration. I am baffled.

Hi !!
I get this error : The website encountered an unexpected error. Try again later.
 when trying to edit a "image style".
I here is informations I did'nt have any idear about !

<em><blockquote>The website encountered an unexpected error. Try again later.

DivisionByZeroError: Division by zero in template_preprocess_image_style_preview() (line 77 of core/modules/image/image.admin.inc).