Django multiple formsets in one view not scaling

gistfile1.txt

VIEWS.PY

from django.shortcuts import render
from .forms import modelformset_factory, AssumptionsForm
from .models import Assumptions

model_names = ['A', 'B']

def get_assumptions(request):

    AssumptionsFormset = modelformset_factory(
    Assumptions, form=AssumptionsForm, extra=5)

    if request.method == 'POST':

        formsets = [AssumptionsFormset(request.POST, prefix=thing) for thing in model_names]

        if all([formset.is_valid() for formset in formsets]):

            for formset in formsets:

                for form in formset:

                    form.save()

    else:

        formsets = [AssumptionsFormset(request.POST, prefix=thing) for thing in model_names]

    return render(request, 'assumptions.html', {'formsets': formsets})

    
ASSUMPTIONS.HTML

<div class="form">
  <form action="" method="post">
  {% csrf_token %}
  {% for formset in formsets %}
  {{ formset.management_form }}
  <h1>{{formset.prefix}}</h1>
  <table>
  {{formset}}
  </table>
  {% endfor %}
  <input type="submit" value="Submit">
  </form>
  </div>
  
MODELS.PY

from django.db import models
from django.forms import ModelForm

class Assumptions(models.Model):
         
    Base = models.FloatField(null=True, blank=True, default=None)
  
        
 FORMS.PY
 
from django import forms
from django.forms import modelformset_factory, ModelForm
from .models import Assumptions

class AssumptionsForm(ModelForm):

    class Meta:
        model = Assumptions
        fields = '__all__'
        
ERROR DESCRIPTION:
Validation Error
['ManagementForm data is missing or has been tampered with']
->{{ formset.management_form }}
->  return render(request, 'assumptions.html', {'formsets': formsets})  local vars

COMMENTS:
Tried to placing formset.management_form in many locations at template such as taking out of for loop, taking out of form tags,
using formsetS.management_form and etc. Yet, still not working.