При сохранении изменённого объекта(записи в бд ) возникает ошибка django.db.utils.IntegrityError: UNIQUE constraint failed: notes_Reminder.info_id

from django.http import Http404
from rest_framework.permissions import IsAuthenticated
from rest_framework.response import Response
from rest_framework.views import APIView

from notes.api.serializers import *
from notes.api.service import *
from notes.api.utils import is_valid_uuid

class ReminderAPIView(APIView):
    serializer_class = ReminderSerializer


   def get(self, request, pk):
        if not is_valid_uuid(pk):
            raise Http404
        reminder = get_reminder(pk)
        json_reminder = self.serializer_class(reminder)
        return Response(json_reminder.data)

    def patch(self, request, pk):
        if not is_valid_uuid(pk):
            raise Http404
        data = request.data
        reminder = get_reminder(pk=pk)
        serializer = self.serializer_class(reminder, data=data)
        if serializer.is_valid():
            update_reminder = serializer.save()
            json_reminder = self.serializer_class(update_reminder)
            return Response(json_reminder.data)
        return Response(serializer.errors)

class PlanAPIView(APIView):
    serializer_class = PlanSerializer


 def get(self, request, pk):
        if not is_valid_uuid(pk):
            raise Http404
        plan = get_plan(pk=pk)
        json_plan = self.serializer_class(plan)
        return Response(json_plan.data)

    def patch(self, request, pk):
        if not is_valid_uuid(pk):
            raise Http404
        data = request.data
        plan = get_plan(pk=pk)
        serializer = self.serializer_class(plan, data=data)
        if serializer.is_valid():
            update_plan = serializer.save()
            json_plan = self.serializer_class(update_plan)
            return Response(json_plan.data)
        return Response(serializer.errors)