Cacti

I am getting same error when running Discovery in cacti 8.8f on a fresh install. CMDPHP: Poller[0] ERROR: A DB Exec Failed!, Error:'1064', SQL:"REPLACE INTO plugin_discover_hosts (hostname, ip, hash, community, snmp_version, snmp_username, snmp_password, snmp_auth_protocol, snmp_priv_passphrase...

Fairly new to cacti. Been using over 3 months. First time having this issue. I can setup Discovery to find network hosts, run php findhosts.php -d -f and discover hosts but but get following output: 08/25/2015 08:37:03 AM - DISCOVER: Poller[0] 254 IPs Scanned, 32 IPs Responded to Ping, 4 Responded t...