Django Multi Step Form duplicate key value - django

Question

I'm attempting to implement a multi-step form on Django and am relatively new to the language but am having difficulty when it comes to saving to the data to the backend. Any help would be much appreciated. Spend around 8 hours trying to figure this out myself.
I need to pass the code and name from model Books to People and then insert the other required information on step 2 as this is a separate table model.
There is a foreign key connecting People to Books via the id.
Views.py
#Step1
def step1(request):
initial={'code': request.session.get('code', None),
}
form = PrimaryForm(request.POST or None, initial=initial)
if request.method == 'POST':
if form.is_valid():
return HttpResponseRedirect(reverse('main_app:step2'))
return render(request, 'step1.html', {'form': form})
#Step2
def step2(request):
form = SecondaryForm(request.POST or None)
if request.method == 'POST':
if form.is_valid():
form1 = form.save(commit=False)
form2 = People.objects.create(code=request.session['code'])
form1.save()
return HttpResponseRedirect(reverse('main_app:finished'))
return render(request, 'step2.html', {'form': form})
Forms.py
#models/forms
class PrimaryForm(forms.ModelForm):
class Meta:
model = People
fields = ('id','code','name',)
class SecondaryForm(forms.ModelForm):
class Meta:
model = Books
fields = ('type','title',)
exclude = ('book_id',)
Error message
insert or update on table "PEOPLE" violates foreign key constraint
DETAIL: Key (id_id_id)=(0) is not present in table "PEOPLE".
The code, name should pass through the forms and at step 2 save the information from both forms.