Steps to reproduce the issue

• Install 5.4.0-beta1 on public available site with disabled Automated Updates (before deleting the installation folder)
• Install 'Alpha Update Server' 0.6.1 plugin from 45540
• Enable Automated Updates
• Wait for successful Automated Update to 5.4.113
• Remove files and database, w/o unregistering from Automated Updates before
• Install 5.4.0-beta1 again for the same domain and with disabled Automated Updates (before deleting the installation folder)
• Enable 'Log Almost Everything' and 'Debug System'
• Install 'Alpha Update Server' 0.6.1 plugin from 45540
• Do not enable Automated Updates
• Wait for at least one hour
• Check HTTP request log for joomlaupdate/healthcheck

Expected result

HTTP Status code 400 bad request for invalid token from previous installation.
At least never an 500 internal server error.

Actual result

HTTP Status 500 internal server error:

52.14.131.139 - - [21/Aug/2025:20:30:17 +0200] "GET /api/index.php/v1/joomlaupdate/healthcheck HTTP/1.1" 500 1696 "-" "Joomla.org Automated Updates Server" [245297]
52.14.131.139 - - [21/Aug/2025:20:45:13 +0200] "GET /api/index.php/v1/joomlaupdate/healthcheck HTTP/1.1" 500 1696 "-" "Joomla.org Automated Updates Server" [40852]
52.14.131.139 - - [21/Aug/2025:21:00:15 +0200] "GET /api/index.php/v1/joomlaupdate/healthcheck HTTP/1.1" 500 1696 "-" "Joomla.org Automated Updates Server" [41797]

System information (as much as possible)

SELinux CentOS Stream 9, PHP 8.4.11, Apache 2.4.62

Additional comments

For the 500 there are no entries found in Joomla logs (even with 'Log Almost Everything' and 'Debug System' enabled) and not in PHP error log.

This test was supposed to verify the fix for 45934. Therefore, on 21 Aug 2025, 21:15 CEST the Automated Updates was enabled, the instance was automatically updated to 5.4.113 and after that there was successfully only the HTTP status code 200 OK for joomlaupdate/healthcheck every 75 minutes.