Barnyard2 error after Install Pulledpork and Rules Snort

[msyahrizal]

i have a project using snort barnyard2 and snorby, but while i want to test for running

barnyard2 -c /etc/snort/barnyard2.conf -d /var/log/snort -f snort.u2 -w /var/log/snort/barnyard2.waldo -g snort -u snort

WARNING: invalid Reference spec '2015-0666'. Ignored Barnyard2 spooler: Event cache size set to [2048] Log directory = /var/log/barnyard2 INFO database: Defaulting Reconnect/Transaction Error limit to 10 INFO database: Defaulting Reconnect sleep time to 5 second ERROR: database mysql_error: Duplicate entry '56308-2' for key 'PRIMARY' SQL=[INSERT INTO sig_reference (ref_id,sig_id,ref_seq) VALUES ('46407','56308','2');] Fatal Error, Quitting.. Barnyard2 exiting database: Closing connection to database "snorby"

Record Totals: Records: 0 Events: 0 (0.000%) Packets: 0 (0.000%) Unknown: 0 (0.000%) Suppressed: 0 (0.000%)

what should i do ? help please