Integrity-error django :violates not-null constraint

I build a social media application where all actions are concluded in the same count. However with the like button i get an error even if the code looks exactly the same as the dislike version. The error is:

IntegrityError at /like-post
null value in column "num_interactions_total" of relation "core_likepost" violates not-null constraint
DETAIL:  Failing row contains (98, a4aaa95b-a3a5-49a6-8f63-de768bfa0786, 2023-02-02 18:01:13.121023+00, , 1, null, 7).

but the num_interactions_total count is already deleted and does not exist in the model or views.py anymore. I've also deleted the migrations. I'm using the postgresql database.

I´m a little confused, why it gives me an error only with this button and not with all the others... How do I avoid the null error?

Here are the models and views from like and dislike:

def like_pdf(instance, filename):
    ext = filename.split('.')[-1]
    filename = 'post{}.{}'.format(instance.interactions_total, ext)
    return os.path.join('uploads', filename)


class LikePost(models.Model):
    post_id = models.CharField(max_length=500)
    created_at = models.DateTimeField(default=datetime.now)
    num_likes_total = models.IntegerField(default=0)
    interactions_total = models.IntegerField(default=0)
    pdf_like = models.FileField(upload_to=like_pdf, default=None, null=True)
    def __str__(self):
        return self.post_id


def dislike_pdf(instance, filename):
    ext = filename.split('.')[-1]
    filename = 'post{}.{}'.format(instance.interactions_total, ext)
    return os.path.join('uploads', filename)

class DislikePost(models.Model):
    post_id = models.CharField(max_length=500)
    created_at = models.DateTimeField(default=datetime.now)
    num_dislikes_total = models.IntegerField(default=0)
    interactions_total = models.IntegerField(default=0)
    pdf_dislike = models.FileField(upload_to=dislike_pdf, default=None, null=True)


    def __str__(self):
        return self.post_id




def like_post(request):
    post_id = request.GET.get('post_id')
    post = Post.objects.get(id=post_id)
    post.number_of_likes = post.number_of_likes + 1
    num_likes_total = LikePost.objects.count() + 1
    interactions_total = InteractionPost.objects.count()
    new_like = LikePost.objects.create(post_id=post_id, num_likes_total=num_likes_total, interactions_total=interactions_total)
    new_like.save()
    new_interaction = InteractionPost.objects.create(post_id=post_id)
    new_interaction.save()
    post.interaction_count = post.interaction_count + 1



    likes_string = ""
    word = "like "

    i = 0
    while i < 1:
        post.likes_string = post.likes_string + word + os.linesep
        i += 1

    post.save()

    # create pdf dislike
    buffer = io.BytesIO()
    countobject = UserCount.objects.first()


    p = canvas.Canvas(buffer, pagesize=A4)

    x_start = 50
    y_start = 200
    x = 100
    y = 275

    p.roundRect(x_start, y_start, 500, 400, 10, stroke=1, fill=0)
    p.roundRect(x, y, 400, 300, 10, stroke=1, fill=0)

    p.drawString(100, 700, "new_interaction: like_post // user no.:")
    p.drawString(100, 675, str(new_like.created_at))
    p.drawString(200, 650, str(post.num_post))
    p.drawString(100, 650, "post no.:")
    p.drawString(400, 700, str(countobject))

    p1 = Paragraph(post.dislikes_string)
    p1.wrapOn(p, 400, 1000)
    p1.drawOn(p, 200, 700)

    p2 = Paragraph(post.likes_string)
    p2.wrapOn(p, 400, 1000)
    p2.drawOn(p, 0, 800)
    p.save()

    buffer.seek(0)

    new_like.pdf_like.save(f"post{interactions_total}.pdf", buffer)
    new_like.save()

    return redirect('/')


def dislike_post(request):
    post_id = request.GET.get('post_id')
    post = Post.objects.get(id=post_id)
    post.number_of_dislikes = post.number_of_dislikes + 1
    num_dislikes_total = DislikePost.objects.count() + 1
    interactions_total = InteractionPost.objects.count()

    new_dislike = DislikePost.objects.create(post_id=post_id, num_dislikes_total=num_dislikes_total, interactions_total=interactions_total)
    new_dislike.save()
    new_interaction = InteractionPost.objects.create(post_id=post_id)
    new_interaction.save()
    post.interaction_count = post.interaction_count + 1

    dislikes_string = ""
    word = "dislike "
    i = 0
    while i < 1:
        post.dislikes_string = post.dislikes_string + word + os.linesep
        i += 1

    post.save()

    #create pdf dislike
    buffer = io.BytesIO()
    countobject = UserCount.objects.first()

    p = canvas.Canvas(buffer, pagesize=A4, )

    x_start = 50
    y_start = 200
    x = 100
    y = 275

    p.roundRect(x_start, y_start, 500, 400, 10, stroke=1, fill=0)
    p.roundRect(x, y, 400, 300, 10, stroke=1, fill=0)

    p.drawString(100, 700, "new_interaction: dislike_post // user no.:")
    p.drawString(100, 675, str(new_dislike.created_at))
    p.drawString(200, 650, str(post.num_post))
    p.drawString(100, 650, "post no.:")
    p.drawString(400, 700, str(countobject))

    p1 = Paragraph(post.dislikes_string)
    p1.wrapOn(p, 400, 1000)
    p1.drawOn(p, 0, 300)

    p2 = Paragraph(post.likes_string)
    p2.wrapOn(p, 400, 1000)
    p2.drawOn(p, 110, 600)
    p.save()
    buffer.seek(0)

    new_dislike.pdf_dislike.save(f"post{interactions_total}.pdf", buffer)
    new_dislike.save()

    return redirect('/')

I know the code is quite messy.But where does the error come from?

python manage.py migrate test_app 0001_test_1