SQLSTATE[23000]: Integrity constraint violation: 4025 CONSTRAINT

my controller code

 public function updateHour(Request $request,$dayId)
    {            $data=$request->validate([
                  'staff_schedule_day_id' =>'required',
                   'start_time' => 'required',
                    'end_time' => 'required'
                     ]);

                 $hourId=StaffScheduleDayHour::where('staff_schedule_day_id',$dayId)->get()->pluck('id');

                         for ($i=0; $i<count($hourId); $i++) {

                         StaffScheduleDayHour::
                                 where('staff_schedule_day_id',$dayId)
                                 ->update($data);


                         }

                return view('staff.schedule.edit', $data)->with('success', trans('messages.itemUpdated'));
     }

Blade Codes

<form action="{{ route('staff.schedule.updateHour',$day->id)}}" method="post" id="form2" >
   @csrf
  @method('patch')
 <input type="hidden"  value="{{$day->id}}" name="staff_schedule_day_id" required>
    @foreach($staffSchedulesDayHour as $hour)
            @if($day->id==$hour->staff_schedule_day_id)
                  <div class="input-group mb-3 " >
                           <div class="input-group-append">
                                    <input type="time" class="form-control" value="{{$hour->start_time}}" name='start_time' required>
                                     <input type="time" class="form-control" value="{{$hour->end_time}}" name='end_time' required>

                        </div>

                 </div>
          @endif
    @endforeach
</form>

Error

SQLSTATE[23000]: Integrity constraint violation: 4025 CONSTRAINT `staff_schedule_day_hours.start_time` failed for `appointnow1`.`staff_schedule_day_hours` (SQL: update `staff_schedule_day_hours` set `staff_schedule_day_id` = 43, `start_time` = 00:30, `end_time` = 01:00, `staff_schedule_day_hours`.`updated_at` = 2021-04-27 09:00:15 where `staff_schedule_day_id` = 43) 

help me please.