worked great-now stopped working-duplicate entry error

Hi,

Module worked great for months. Have not added or changed anything on the site. Now after cron job runs I get this error message. The feed is not updating and I get this message for every new Tweet that is done on Twitter

user warning: Duplicate entry '2147483647' for key 1 query: INSERT INTO twitter (twitter_id, screen_name, created_at, created_time, text, source) VALUES (2386531227, 'themergeshow', 'Mon Jun 29 12:05:12 +0000 2009', 1246277112, 'working on new contests this week. Direct votes on www.themergeshow.com not more Text Voting. Info Coming soon.', 'web') in /home7/themerg1/public_html/includes/common.inc on line 3422.