Discuz! Database Error

(1062) Duplicate entry '0' for key 'data_extraction_temp1.uid_2'
INSERT INTO data_extraction_temp1 SET `uid`='0'

PHP Debug

No.FileLineCode
1misc.php93discuz_application->init()
2source/class/discuz/discuz_application.php70discuz_application->_init_cron()
3source/class/discuz/discuz_application.php574discuz_cron::run()
4source/class/discuz/discuz_cron.php48include(%s)
5source/include/cron/cron_data_extraction_task.php79discuz_database::insert(%s, Array)
6source/class/discuz/discuz_database.php60discuz_database::query(%s, %s, %s, true)
7source/class/discuz/discuz_database.php139db_driver_mysqli->query(%s, %s, true)
8source/class/db/db_driver_mysqli.php157db_driver_mysqli->halt(%s, %d, %s)
9source/class/db/db_driver_mysqli.php232break()
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