Django form throws select valid choice - django

Question

I have read every answer for this question but none of them solved my problem completely. I hope someone can help me understand what is wrong in my code. I have a field in my model and I want all the values in that field to be displayed in a dropdown in my form. I was able to achieve that but when I try to save, it says "Select a valid choice. That choice is not one of the available choices." Any help would be greatly appreciated.
models.py
class Item(models.Model):
Product = models.ForeignKey("Product", related_name = "Items")
Name = models.CharField(max_length=1000, blank=True, null=True)
Tag = models.CharField(max_length=1000, blank=True, null=True)
forms.py
class ItemForm(ModelForm):
items = Item.objects.values_list('Name', flat=True)
item_choices = [(item, item) for item in items]
Name = forms.ModelChoiceField(items, widget=forms.Select())
class Meta:
model = Item
fields = ['Name', 'Tag']
views.py
def newknowledgebase(request):
itemformset = modelformset_factory(Item, form=ItemForm, extra=2)
items = itemformset(queryset=Item.objects.none(), prefix='items', )
if request.method=='POST':
items = itemformset(request.POST, queryset=Item.objects.none(), prefix='items', )
item = request.POST.get('items')
for form in items:
form.fields['Name'].choices = [(item, item)]
if items.is_valid():
items.save()
context = {
'items':items,
}
return render(request, 'newknowledgebase.html', context )
html file
<div id="items" class="panel-collapse collapse">
<table class="table table-bordered">
<tbody>
{{ items }}
</tbody>
</table>
</div>

Answer 1

Try this
Name = forms.ChoiceField(item_choices, widget=forms.Select())