Pull Request for Issue #28624 .

Summary of Changes

Removes the obsolete repetabale field from the list of core extensions in the extensions helper and adds the (hopefully) last ones which have been forgotten before.

Testing Instructions

Test 1: Reproduce the issue

1. Update 3.10 nightly to Joomla 4.0 using the regular 4.0 nightly update package or custom URL.
   Hint: If you have the language filter plugin enabled on your 3.10 and are using a MySQL or MariaDB database, you should use the MySQL (PDO) database driver and not MySQLi (you can change that in Global Confiruation if necessary), otherwise you will run into issue #28614 .

• When using Live Update with custom URL (most comfortable way): Use custom URL https://update.joomla.org/core/nightlies/next_major_list.xml
• When using Upload & Update: Download the package from here: https://developer.joomla.org/nightlies/Joomla_4.0.0-beta1-dev-Development-Update_Package.zip.

2. Login to backend.

3. Set error reporting to "Maximum" in Global Configuration.

4. Go to extensions manager.

Result: See actual result below.

Test 2: Test that this Pull Request (PR) solves it

Do the same as in Test 1 but this time use the update package or custom update URL created for this PR .

• When using Live Update with custom URL (most comfortable way): Use custom URL https://ci.joomla.org/artifacts/joomla/joomla-cms/4.0-dev/28625/downloads/31106/pr_list.xml
• When using Upload & Update: Download the package from here: https://ci.joomla.org/artifacts/joomla/joomla-cms/4.0-dev/28625/downloads/31106/Joomla_4.0.0-beta1-dev+pr.28625-Development-Update_Package.zip.

Result: See expected result below.

Expected result

No PHP notices of type "Undefined property: stdClass::$version".

Actual result

Notice: Undefined property: stdClass::$version in /administrator/components/com_installer/tmpl/manage/default.php on line 111

Notice: Undefined property: stdClass::$version in /administrator/components/com_installer/tmpl/manage/default.php on line 127

Documentation Changes Required