Multiple checkboxes are not working,it is showing selected choice isn't a valid choice.

[learn code]

Hello,
I'm working on a application form it has multiple checkboxes,when I submit the form it is showing selected choice isn't a valid choice.
If anyone knows how to use checkboxes in ModelForm plz help me.

Models.py
class Application(models.Model):

    STATE_CHOICES =( 

    ("1","Alabama"),("2","Alaska"),("3","Arizona"),("4","Arkansas"),("5","California"),("6","Colorado"),

    ("7","Connecticut"),("8","Delaware"),("9","Florida"),("10","Georgia"),("11","Hawaii"),("12","Idaho"),

    ("13","Illinois"),("14","Indiana"),("15","Iowa"),("16","Kansas"),("17","Kentucky"),("18","Louisiana"),

    ("19","Maine"),("20","Maryland"),("21","Massachusetts"),("22","Michigan"),("23","Minnesota"),("24","Mississippi"),

    ("25","Missouri"),("26","Montana"),("27","Nebraska"),("28","Nevada"),("29","New Hampshire"),("30","New Jersey"),

    ("31","New Mexico"),("32","New York"),("33","North Carolina"),("34","North Dakota"),("35","Ohio"),

    ("36","Oklahoma"),("37","Oregon"),("38","Pennsylvania"),("39","Rhode Island"),("40","South Carolina"),

    ("41","South Dakota"),("42","Tennessee"),("43","Texas"),("44","Utah"),("45","Vermont"),("46","Virginia"),

    ("47","Washington"),("48","West Virginia"),("49","Wisconsin"),("50","Wyoming"),

    ) 

    GENDER_CHOICES=(

     ('male','Male'),

     ('female','Female'),

    )

    k=(

    ('yes','Yes'),

    ('no','No'),

    )

    degree=(

    ('yes','Yes'),

    ('no','No'),

    )

    classroom=(

    ('yes','Yes'),

    ('no','No'),

    )

    genres1=(

       ('classical','Classical'),

       ('rock','Rock'),

       ('musical Theater','Musical Theater'),

       ('country','country'),

       ('blues','Blues'),

       ('christian Contemporary','Christian Contemporary'),

       ('gospel','Gospel'),

       ('other','Other'),

    )

    languages1=(

        ('english','English'),

        ('spanish','Spanish'),

        ('german','German'),

        ('chinese','Chinese'),

        ('hindi','Hindi'),

        ('french','French'),

        ('russian','Russian'),

        ('turkish','Turkish'),

    )

    firstname=models.CharField(max_length=50)

    lastname=models.CharField(max_length=50)

    Email=models.EmailField()

    phonenumber=models.CharField(max_length=15)

    password = models.CharField(max_length=100)

    confirm_password=models.CharField(max_length=100)

    address1 = models.CharField(max_length=100)

    address2 = models.CharField(max_length=100)

    state = models.CharField(max_length=100,choices=STATE_CHOICES)

    city = models.CharField(max_length=100)

    zipcode=models.CharField(max_length=15)

    DOB=models.DateField()

    Gender=models.CharField(max_length=50,choices=GENDER_CHOICES)

    k=models.CharField(max_length=50,choices=k)

    degree=models.CharField(max_length=50,choices=degree)

    classroom=models.CharField(max_length=50,choices=classroom)

    genres=models.CharField(max_length=50, choices=genres1)

    languages=models.CharField(max_length=50, choices=languages1)

    created_at = models.DateTimeField(auto_now_add=True)

    updated_at = models.DateTimeField(auto_now=True)

    application_field = models.SlugField(max_length = 200)

    def __str__(self):

        return self.firstname

..

Views.py

from django.shortcuts import render,redirect, get_object_or_404

from onlinetutors.models import Category,tutors

from .forms import application

from .models import Application

Create your views here.

def registration(request):

    if request.method == 'POST':

        form=application(request.POST)

        if form.is_valid():

            form.save()

            print("Hellooooooooo")

            firstname=form.cleaned_data['firstname']

            

            lastname=form.cleaned_data['lastname']

            Email=form.cleaned_data['Email']

            phonenumber=form.cleaned_data['phonenumber']

            password = form.cleaned_data['password']

            confirm_password=form.cleaned_data['confirm_password']

            address1 = form.cleaned_data['address1']

            address2 = form.cleaned_data['address2']

            state = form.cleaned_data['state']

            city =form.cleaned_data['city']

            zipcode=form.cleaned_data['zipcode']

            DOB=form.cleaned_data['DOB']

            Gender=form.cleaned_data['Gender']

            k=form.cleaned_data['k']

            degree=form.cleaned_data['degree']

            classroom=form.cleaned_data['classroom']

            genres=form.cleaned_data['genres']

            languages=form.cleaned_data['languages']

            form=Application(firstname=firstname,lastname=lastname,Email= Email,phonenumber=phonenumber,

            password=password,address1=address1,address2=address2, state= state,city=city,zipcode=zipcode,

            DOB=DOB,Gender=Gender,k=k,degree=degree,classroom=classroom,languages=languages,genres=genres)

           

            form.save()

            return redirect("/thankyou/")

    else:

        form=application()

    return render(request,"registration.html",{"form":form})

forms.py

from django import forms

from django.forms import ModelForm

from .models import practiceTable

class application(ModelForm):

   

    GENDER_CHOICES=(

      ('male','Male'),

      ('female','Female'),

    )

    k=(

     ('yes','Yes'),

     ('no','No'),

    )

    degree=(

     ('yes','Yes'),

     ('no','No'),

    )

    classroom=(

     ('yes','Yes'),

     ('no','No'),

    )

    genres1=(

       ('classical','Classical'),

       ('rock','Rock'),

       ('musical Theater','Musical Theater'),

       ('country','country'),

       ('blues','Blues'),

       ('christian Contemporary','Christian Contemporary'),

       ('gospel','Gospel'),

       ('other','Other'),

    )

    languages1=(

        ('english','English'),

        ('spanish','Spanish'),

        ('german','German'),

        ('chinese','Chinese'),

        ('hindi','Hindi'),

        ('french','French'),

        ('russian','Russian'),

        ('turkish','Turkish'),

    )

    DOB=forms.DateField(widget = forms.SelectDateWidget) 

    Gender= forms.CharField(label='Gender',widget=forms.RadioSelect(choices=GENDER_CHOICES))

    k12=forms.CharField(label="Have you taught in K-12 schools?",widget=forms.RadioSelect(choices=k))

    degree=forms.CharField(label="Do you have a 4 year degree?",widget=forms.RadioSelect(choices=degree))

    classroom=forms.CharField(label="Have you taught in a classroom setting?",widget=forms.RadioSelect(choices=classroom))

    genres=forms.MultipleChoiceField(required=True,widget=forms.CheckboxSelectMultiple,choices=genres1)

    languages=forms.MultipleChoiceField(required=True,widget=forms.CheckboxSelectMultiple,choices=languages1)

    

    class Meta:

        model=Application

        exclude = ('application_field',)