diff --git a/src/program/forms.py b/src/program/forms.py
index a8a29ae3..9f03ebdb 100644
--- a/src/program/forms.py
+++ b/src/program/forms.py
@@ -1,6 +1,7 @@
 import logging
 
 from django import forms
+from django.core.exceptions import ImproperlyConfigured
 
 from .models import SpeakerProposal, EventProposal, EventTrack, Url, UrlType
 
@@ -178,19 +179,26 @@ class EventProposalForm(forms.ModelForm):
         # TODO: make sure the track is part of the current camp, needs camp as form kwarg to verify
         return track
 
-    def save(self, user, event_type, commit=True):
-        self.instance.user = user
-        self.instance.event_type = event_type
-        super().save(commit=True)
-        if self.cleaned_data.get('slides_url') and (self.instance.event_type.name == 'Talk' or self.instance.event_type.name == 'Lightning Talk'):
-            slides_url = Url()
-            slides_url.eventproposal = self.instance
-            slides_url.url = self.cleaned_data['slides_url']
-            slides_url.urltype = UrlType.objects.get(name="Slides")
-            slides_url.save()
-        return self.instance
+    def save(self, commit=True, user=None, event_type=None):
+        eventproposal = super().save(commit=False)
+        if user:
+            eventproposal.user = user
+        if event_type:
+            eventproposal.event_type = event_type
+        eventproposal.save()
 
 
+        if self.cleaned_data.get('slides_url') and event_type.name in ['Talk', 'Lightning Talk']:
+            url = self.cleaned_data.get('slides_url')
+            if not eventproposal.urls.filter(url=url).exists():
+                slides_url = Url()
+                slides_url.eventproposal = eventproposal
+                slides_url.url = url
+                slides_url.urltype = UrlType.objects.get(name="Slides")
+                slides_url.save()
+
+        return eventproposal
+
     def __init__(self, camp, eventtype=None, *args, **kwargs):
         # initialise form
         super().__init__(*args, **kwargs)
@@ -274,7 +282,7 @@ class EventProposalForm(forms.ModelForm):
             self.fields['submission_notes'].label = 'Talk Notes'
             self.fields['submission_notes'].help_text = 'Private notes regarding this talk. Only visible to yourself and the BornHack organisers.'
 
-            if eventtype.name == "Lightning Talk":
+            if self.fields.get('slides_url') and eventtype.name == "Lightning Talk":
                 self.fields['slides_url'].help_text += " You will only get assigned a slot if you have provided slides (a title slide is enough if you don't use slides for the talk). You can add an URL later if need be."
 
             # no duration for talks
diff --git a/src/program/views.py b/src/program/views.py
index d611cca9..af900b29 100644
--- a/src/program/views.py
+++ b/src/program/views.py
@@ -1,11 +1,9 @@
 import logging
-import os
 from collections import OrderedDict
 
 from django.views.generic import ListView, TemplateView, DetailView, View
-from django.views.generic.edit import CreateView, UpdateView, DeleteView, FormView
+from django.views.generic.edit import CreateView, UpdateView, DeleteView
 from django.conf import settings
-from django.views.decorators.http import require_safe
 from django.http import Http404, HttpResponse
 from django.utils.decorators import method_decorator
 from django.contrib.admin.views.decorators import staff_member_required
@@ -14,14 +12,13 @@ from django.contrib import messages
 from django.urls import reverse, reverse_lazy
 from django.template import Engine, Context
 from django.shortcuts import redirect
-from django.core.exceptions import ImproperlyConfigured
 from django.shortcuts import get_object_or_404
 from betterforms.multiform import MultiModelForm
 import icalendar
 
 from camps.mixins import CampViewMixin
+from program.models import Url, UrlType
 from .mixins import (
-    EnsureUnapprovedProposalMixin,
     EnsureUserOwnsProposalMixin,
     EnsureWritableCampMixin,
     EnsureCFPOpenMixin,
@@ -417,11 +414,7 @@ class EventProposalCreateView(LoginRequiredMixin, CampViewMixin, EnsureWritableC
 
     def form_valid(self, form):
         # set camp and user for this eventproposal
-        eventproposal = form.save(
-            user=self.request.user,
-            event_type=self.event_type,
-            commit=True,
-        )
+        eventproposal = form.save(user=self.request.user, event_type=self.event_type)
 
         # add the speakerproposal to the eventproposal
         eventproposal.speakers.add(self.speakerproposal)
@@ -569,10 +562,7 @@ class CombinedProposalSubmitView(LoginRequiredMixin, CampViewMixin, CreateView):
         Save the object(s) here before redirecting
         """
         if hasattr(self, 'speakerproposal'):
-            eventproposal = form.save(commit=False)
-            eventproposal.user = self.request.user
-            eventproposal.event_type = self.eventtype
-            eventproposal.save()
+            eventproposal = form.save(user=self.request.user, event_type=self.eventtype)
             eventproposal.speakers.add(self.speakerproposal)
         else:
             # first save the SpeakerProposal
@@ -584,7 +574,7 @@ class CombinedProposalSubmitView(LoginRequiredMixin, CampViewMixin, CreateView):
             speakerproposal.save()
 
             # then save the eventproposal
-            eventproposal = form['eventproposal'].save(commit=False)
+            eventproposal = form['eventproposal'].save(user=self.request.user, event_type=self.eventtype)
             eventproposal.user = self.request.user
             eventproposal.event_type = self.eventtype
             eventproposal.save()