Occ db:add-missing-indices not possible after upgrade to version 21.0.0

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1

I upgraded Nextcloud to version 21.0.0 and everything worked fine so fare. Except for the fact that I cannot add the missing indices.

Ubuntu 18.04.3
Plesk Obsidian 18.0.33
PHP 7.4.15
Maria DB 10.5.8

After the command the following message appears:

/var/www/vhosts/mydomain.com/mydomain.com$ sudo -u www-data php occ db:add-missing-indices
This version of Nextcloud requires at least PHP 7.3<br/>You are currently running 7.2.24-0ubuntu0.18.04.2. Please update your PHP version.

The curious thing is that the PHP version 7.2.24 is not installed. Does anyone have an idea why this happens?

2

Sure?

Maybe both versions are installed. 7.2 is default shipped php version.

How did you install 7.4?

3

The default version by OS vendor is 7.2.10 not 7.2.24. Nextcloud runs under version 7.4.15.

I have installed 7.4 via Plesk updates.