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Zabbix not collecting data after migrating site and database on new machine

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    Zabbix not collecting data after migrating site and database on new machine

    I have strange problem with Zabbix after migrating on other machine. I've backed up database with this script:
    https://zabbix.org/wiki/Docs/howto/d..._backup_script
    This script backed up only configuration data and no history items.
    I've installed on new machine Ubuntu 18.04 with mariadb and zabbix 4.4.10, I've restored database, user and password and of course /etc/zabbix/zabbix_server.conf. Zabbix WWW frontend works correctly, but all hosts on list Configuration->Hosts looks like on attached screenshot1.png. Logs tells nothing. Nothing changes with status and graps of hosts. So I decided to make an experiment - I cloned one of hosts. And I saw logs info that cloned host becamed avaliable, and status looks correctly (as on attached screenshot2.png). Graphs for cloned host show data. I think problem is somewhere in database but I didn't find where and which table/column has wrong value.
    What can I do to make all hosts collecting data without cloning them ? I have about 1000 hosts and cloning host after host is not my dreamed job
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