Bugzilla has suffered an internal error:

undef error - DBD::mysql::db selectrow_hashref failed: Unknown column 'default_bug_type' in 'field list' [for Statement " SELECT id,name,classification_id,description,isactive,default_bug_type,defaultmilestone,allows_unconfirmed,default_platform_id,default_op_sys_id,security_group_id,nag_interval,reviewer_required,votesperuser,maxvotesperbug,votestoconfirm FROM products WHERE id = ?"]