Upgrade from rt 4.4.4 to rt 5.0.3

I want migrade from rt 4.4.4 (Centos 7 with MariaDB) to rt 5.0.3 (Ubuntu 22.04 with PostgreSQL 14) with all old ticket.

I initialize new database on rt 5.0.3 with command
rt-setup-database -action create,schema,acl

How do I load data from MariaDB (rt 4.4.4) to PostgreSQL (rt 5.0.3) ?

I try rt-serializer on old database and rt-importer on new database but get error

[10043] [Thu Dec 29 16:41:18 2022] [critical]: Can’t locate RT/Extension/HelpDesk.pm in @INC (you may need to install the RT::Extension::HelpDesk module) (@INC contains: /opt/rt5/sbin/…/local/lib /opt/rt5/sbin/…/lib /opt/rt5/local/lib/perl5 /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.34.0 /usr/local/share/perl/5.34.0 /usr/lib/x86_64-linux-gnu/perl5/5.34 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl-base /usr/lib/x86_64-linux-gnu/perl/5.34 /usr/share/perl/5.34 /usr/local/lib/site_perl) at /opt/rt5/sbin/…/lib/RT.pm line 849. (/opt/rt5/sbin/…/lib/RT.pm:409)
Can’t locate RT/Extension/HelpDesk.pm in @INC (you may need to install the RT::Extension::HelpDesk module) (@INC contains: /opt/rt5/sbin/…/local/lib /opt/rt5/sbin/…/lib /opt/rt5/local/lib/perl5 /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.34.0 /usr/local/share/perl/5.34.0 /usr/lib/x86_64-linux-gnu/perl5/5.34 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl-base /usr/lib/x86_64-linux-gnu/perl/5.34 /usr/share/perl/5.34 /usr/local/lib/site_perl) at /opt/rt5/sbin/…/lib/RT.pm line 849

If you have the RT/Extension/HelpDesk installed (listed in RT_SiteConfig.pm) then you need to install that extension’s code (don’t run the make initdb step) before