CrontabSchedule addition in PeriodicTask gives error

[rudraksh1997]

sqlalchemy.exc.InterfaceError: (sqlite3.InterfaceError) Error binding parameter 5 - probably unsupported type. [SQL: INSERT INTO celery_periodic_task (name, task, interval_id, crontab_id, solar_id, args, kwargs, queue, exchange, routing_key, priority, expires, one_off, start_time, enabled, last_run_at, total_run_count, date_changed, description) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, CURRENT_TIMESTAMP, ?)] [parameters: (None, 'tasks.add', None, 3, None, (3, 4), '{}', None, None, None, None, None, 0, None, 1, None, 0, '')]