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    Incident report 
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    Resolution: Won't fix
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    Trivial 
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    None
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    4.0.18
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    None
I found the important bug on Zabbix server.
I do not the reason why on 4.0.18 item is created with error column NULL.
So, Configuration Syncer crashed at DCstrpool_replace().
My environment is CentOS 7 and using mariadb.