Bug in file indexer(?)

I get the following bug:

INDEXER HALTED, due to server response:
You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'END, `assignments` = CASE id WHEN 1 THEN 0 WHEN 2 THEN 0 WHEN 3 THEN 0 WHEN...' at line 1

[where]
http://localhost/[...]/administrator/index.php?option=com_flexicontent&view=filemanager
> Maintenance > index file stats (both variants)

[note]
There are file missing in /uploads due to the fact that this is my local dev. env.

[setup]
j 4.2.6
fc 4.1.3
php 8.1
db 10.4.25-MariaDB