upgrade from 1.4.3 to 1.4.4 incorrect time zone error

[G. O.]

Hello,

i upgraded from 1.4.3 to 1.4.4 and getting incorrect time zone error as follow:

2026-05-14 19:09:57 - 1298: Unknown or incorrect time zone: 'Europe/Istanbul'
SET time_zone='Europe/Istanbul';

I use default template of NOVATOR
php: 8.4.20
what is the fix for this issue?

Thanks in advanced