PHP Fatal error: Uncaught exception

Hi, first of all congrats for your plugin, it gets the job done with every link. Everything seems to wok just fine, but once in awhile I get the below error in the log. What can I do to stop getting this?

[14-Sep-2016 13:03:33 UTC] PHP Fatal error: Uncaught exception ‘Exception’ in /home/cate/public_html/wp-content/plugins/wp-affiliate-links/models/model/record.php:78

Stack trace:
#0 /home/cate/public_html/wp-content/plugins/wp-affiliate-links/models/stat/record.php(18): WPAL_Model_Record->insert()
#1 /home/cate/public_html/wp-content/plugins/wp-affiliate-links/models/destination/record.php(139): WPAL_Stat_Record->insert()
#2 /home/cate/public_html/wp-content/plugins/wp-affiliate-links/actions/wp_loaded.php(64): WPAL_Destination_Record->redirect(‘META_REFRESH’)
#3 [internal function]: wpal_wp_loaded(”)
#4 /home/cate/public_html/wp-includes/plugin.php(524): call_user_func_array(‘wpal_wp_loaded’, Array)
#5 /home/cate/public_html/wp-settings.php(432): do_action(‘wp_loaded’)
#6 /home/cate/public_html/wp-config.php(84): require_once(‘/home/cate/publ…’)
#7 /home/cate/public_html/wp-load.php(39): require_once(‘/home/cate/publ…’)
#8 /home/cate/public_html/wp-blog-header.php(13): require_once(‘/home/cate/publ…’)
#9 /home/cate/public_html/index.php(17): re in /home/cate/public_html/wp-content/plugins/wp-affiliate-links/models/model/record.php on line 78