When I try to upgrade from 2.0.3 to 2.1.0 with nationaltalk database, I encounter following errors:

[PDOException]
  SQLSTATE[23502]: Not null violation: 7 ERROR: column "created" contains null values
                                                                                        


migrations:migrate [--write-sql] [--dry-run] [--configuration[="..."]] [--db-configuration[="..."]] [-h|--help] [-q|--quiet] [-v|--verbose] [-V|--version] [-a|--ansi] [-n|--no-interaction] command [version]


PHP Fatal error: Uncaught exception 'PropelException' with message 'Unable to execute SELECT statement [SELECT cc_show_instances.ID, cc_show_instances.STARTS, cc_show_instances.ENDS, cc_show_instances.SHOW_ID, cc_show_instances.RECORD, cc_show_instances.REBROADCAST, cc_show_instances.INSTANCE_ID, cc_show_instances.FILE_ID, cc_show_instances.TIME_FILLED, cc_show_instances.CREATED, cc_show_instances.LAST_SCHEDULED, cc_show_instances.MODIFIED_INSTANCE FROM cc_show_instances WHERE cc_show_instances.STARTS>=:p1] [wrapped: SQLSTATE[42703]: Undefined column: 7 ERROR: column cc_show_instances.created does not exist
LINE 1: ...instances.FILE_ID, cc_show_instances.TIME_FILLED, cc_show_in...
                                                             ^]' in /home/airtimeqa/source/airtime/airtime_mvc/library/propel/runtime/lib/query/ModelCriteria.php:1045
Stack trace:
#0 /home/airtimeqa/source/airtime/airtime_mvc/library/propel/runtime/lib/query/ModelCriteria.php(909): ModelCriteria->getSelectStatement(Object(PropelPDO))
#1 /home/airti in /home/airtimeqa/source/airtime/airtime_mvc/library/propel/runtime/lib/query/ModelCriteria.php on line 1045