Fatal error: Uncaught ADODB_Exception: mysqli error: [1062: Duplicate entry '' for key 'request_id'] in EXECUTE("INSERT INTO `app_airtime_sales_callbacks`(`msisdn`, `request_id`, `status`, `response`, `time_stamp`) VALUES ('', '', '', '', now())") in /home/appske/x_api2.apps.ke/adodb5/adodb-exceptions.inc.php:78 Stack trace: #0 /home/appske/x_api2.apps.ke/adodb5/adodb.inc.php(1071): adodb_throw('mysqli', 'EXECUTE', 1062, 'Duplicate entry...', 'INSERT INTO `ap...', false, Object(ADODB_mysqli)) #1 /home/appske/x_api2.apps.ke/adodb5/adodb.inc.php(1046): ADOConnection->_Execute('INSERT INTO `ap...', false) #2 /home/appske/x_api2.apps.ke/myfunctions.php(128): ADOConnection->Execute('INSERT INTO `ap...') #3 /home/appske/x_api2.apps.ke/process_callback.php(19): safequery2(Object(ADODB_mysqli), 'INSERT INTO `ap...') #4 {main} thrown in /home/appske/x_api2.apps.ke/adodb5/adodb-exceptions.inc.php on line 78