server not starting after upgrade

[fulltilt]

upgraded from 1.6 to 1.8.3 without errors also installed database updates ...
but zabbix server not working:
zabbix_server.log

Unknown column 'i.nextcheck' in 'field list

need help

[richlv]

you did not upgrade properly - you are still running zabbix 1.6. try

zabbix_server --version

you should be able to see all zabbix_server binaries in your path by issuing :

whereis zabbix_server