Schema was out of sync with the main tables

modules/t/test-genome-DBs/homo_sapiens/core/xref.sql

 CREATE TABLE `xref` (
   `xref_id` int(10) unsigned NOT NULL auto_increment,
-  `external_db_id` int(11) NOT NULL default '0',
-  `dbprimary_acc` varchar(40) collate latin1_bin NOT NULL default '',
-  `display_label` varchar(128) collate latin1_bin NOT NULL default '',
-  `version` varchar(10) collate latin1_bin NOT NULL default '',
+  `external_db_id` int(11) NOT NULL,
+  `dbprimary_acc` varchar(40) collate latin1_bin NOT NULL,
+  `display_label` varchar(128) collate latin1_bin NOT NULL,
+  `version` varchar(10) collate latin1_bin NOT NULL default 0,
   `description` text collate latin1_bin,
   `info_type` enum('NONE','PROJECTION','MISC','DEPENDENT','DIRECT','SEQUENCE_MATCH','INFERRED_PAIR','PROBE','UNMAPPED','CHECKSUM') collate latin1_bin NOT NULL default 'NONE',
   `info_text` varchar(255) collate latin1_bin NOT NULL default '',
   PRIMARY KEY  (`xref_id`),
   UNIQUE KEY `id_index` (`dbprimary_acc`,`external_db_id`,`info_type`,`info_text`),
-  KEY `display_index` (`display_label`)
+  KEY `display_index` (`display_label`),
+  KEY info_type_idx (info_type)
 ) ENGINE=MyISAM AUTO_INCREMENT=1000006 DEFAULT CHARSET=latin1 COLLATE=latin1_bin;