I've noticed that on the zabbix log I've those error that repeats everi second:

query failed: [1062] Duplicate entry '10129-vfs.fs.size[C:,total]' for key 'items_1' [insert into items (itemid,name,key_,hostid,type,value_type,data_type,delay,delay_flex,history,trends,status,trapper_hosts,units,multiplier,delta,formula,logtimefmt,valuemapid,params,ipmi_sensor,snmp_community,snmp_oid,port,snmpv3_securityname,snmpv3_securitylevel,snmpv3_authpassphrase,snmpv3_privpassphrase,authtype,username,password,publickey,privatekey,description,interfaceid,flags) values (35971,'Total disk space - $1','vfs.fs.size[C:,total]',10129,0,3,0,300,'',7,365,0,'','B',0,0,'1','',null,'','','','','','',0,'','',0,'','','','','',30387,4);