getting Error for doesn't have default value: Laravel 5.4.12

i am getting this error

SQLSTATE[HY000]: General error: 1364 Field 'user_id' doesn't have a default value (SQL: insert into day_schedules (updated_at, created_at) values (2017-03-13 06:56:39, 2017-03-13 06:56:39))

Controller:

if(isset($eventId)){
            //dd($eventId);
            for($i=0; $i<$days;$i++){
                $request->request->add(['user_id'=>$userid]);
                $request->request->add(['event_id'=>$eventId]);
                $dayPostData = Day::create($request->except(['_token', 'submit', 'title','description','firstDate','secondDate', 'days','location','tags','event-img','event_img','sch-e','sch-s','sch-title','sch-desc']));
                $dayId=$dayPostData->id;
                //dd($dayId);
                $countSchedules=count($arr[$i]);
                //$scheduleData = DaySchedule::firstOrNew(['user_id' => Auth::user()->id]);
                for ($j=0;  $j < $countSchedules; $j++){
                    //dd($eventId);
                    $request->request->add(['user_id'=>$userid]);
                    $request->request->add(['event_id'=>$eventId]);
                    $request->request->add(['day_id'=>$dayId]);
                    $scheduleData = DaySchedule::create([$request->except(['_token', 'submit', 'title','description','firstDate','secondDate' ,'days','location','tags','event-img','event_img'])]);

                }

            }

        }

Table:

CREATE TABLE day_schedules ( id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT, user_id INT(10) UNSIGNED NOT NULL, event_id INT(10) UNSIGNED NOT NULL, day_id INT(10) UNSIGNED NOT NULL, time_s VARCHAR(50) NOT NULL, time_e VARCHAR(50) NOT NULL, sch_title LONGTEXT NOT NULL, sch_desc LONGTEXT NOT NULL, created_at TIMESTAMP NULL DEFAULT NULL, updated_at TIMESTAMP NULL DEFAULT NULL, PRIMARY KEY (id), INDEX FK_dayschedules_users (user_id), INDEX FK_dayschedules_events (event_id), INDEX FK_dayschedules_days (day_id), CONSTRAINT FK_dayschedules_days FOREIGN KEY (day_id) REFERENCES days (id) ON UPDATE CASCADE ON DELETE CASCADE, CONSTRAINT FK_dayschedules_events FOREIGN KEY (event_id) REFERENCES events (id) ON UPDATE CASCADE ON DELETE CASCADE, CONSTRAINT FK_dayschedules_users FOREIGN KEY (user_id) REFERENCES users (id) ON UPDATE CASCADE ON DELETE CASCADE )

via Jamal Ahmad