diff --git a/src/Form/ParticipantType.php b/src/Form/ParticipantType.php
index 8ef8d8d..4870b05 100644
--- a/src/Form/ParticipantType.php
+++ b/src/Form/ParticipantType.php
@@ -26,7 +26,7 @@ class ParticipantType extends AbstractType
             $participantIndex = $participantData->index;
 
             // don't add any fields for canceled participants
-            if ('F' !== $participantData->status) {
+            if ('S' === $participantData->status) {
                 return;
             }
 
diff --git a/templates/booking/edit.html.twig b/templates/booking/edit.html.twig
index 0fe14d4..b08e601 100644
--- a/templates/booking/edit.html.twig
+++ b/templates/booking/edit.html.twig
@@ -7,7 +7,7 @@
         {% set messages = form.vars.errors|map(error => error.message) %}
         {% include '_partials/_alert.html.twig' with { 'level': 'error', 'title': 'Die Buchung konnte nicht aktualisiert werden', 'messages': messages  } %}
     {% endif %}
-    <div class="flex flex-col space-y-8 pb-8" {{ stimulus_controller('booking', { 'availabilities': availabilities.items }) }} {{ stimulus_controller('iframe') }}>
+    <div class="flex flex-col space-y-8 pb-8" {{ stimulus_controller('booking', { 'availabilities': availabilities.items }) }} {{ stimulus_controller('iframe', { 'offsetTop': 100 }) }}>
         <div class="p-8 border border-gray-300 rounded-md"
                 {{ stimulus_controller('toggle', { 'open': true }, { 'closed': 'hidden' }) }}>
             <div role="button" class="flex items-center justify-between" {{ stimulus_action('toggle', 'toggle', 'click') }}>
@@ -89,16 +89,16 @@
                     </h3>
                     <ul class="list-disc pl-4">
                         <li>
-                            Unterkunft: {{ mutableData.items['accommodation'].mutableBefore|date('d.m.Y') }}
+                            Unterkunft: {% if mutableData.items['accommodation'].mutable %}{{ mutableData.items['accommodation'].mutableBefore|date('d.m.Y') }}{% else  %}nicht mehr möglich{% endif %}
                         </li>
                         <li>
-                            Zusatzleistungen: {{ mutableData.items['additional_services'].mutableBefore|date('d.m.Y') }}
+                            Zusatzleistungen: {% if mutableData.items['additional_services'].mutable %}{{ mutableData.items['additional_services'].mutableBefore|date('d.m.Y') }}{% else  %}nicht mehr möglich{% endif %}
                         </li>
                         <li>
-                            Beförderung: {{ mutableData.items['transportation'].mutableBefore|date('d.m.Y') }}
+                            Beförderung: {% if mutableData.items['transportation'].mutable %}{{ mutableData.items['transportation'].mutableBefore|date('d.m.Y') }}{% else  %}nicht mehr möglich{% endif %}
                         </li>
                         <li>
-                            Zustiege: {{ mutableData.items['pickup'].mutableBefore|date('d.m.Y') }}
+                            Zustiege: {% if mutableData.items['pickup'].mutable %}{{ mutableData.items['pickup'].mutableBefore|date('d.m.Y') }}{% else  %}nicht mehr möglich{% endif %}
                         </li>
                     </ul>
                 </div>
@@ -108,14 +108,14 @@
         {% for child in form.participants %}
             <div>
                 {% set participant = child.vars.data %}
-                {% if participant.status != 'F' %}
+                {% if participant.status == 'S' %}
                     {% do child.setRendered %}
                 {% endif %}
                 <div class="{{ html_classes('p-8 border rounded-md mb-4', { 'border-gray-300': child.vars.valid, 'border-red-500': not child.vars.valid }) }}" {{ stimulus_controller('toggle', {'open': child.vars.valid == false}, { 'closed': 'hidden' }) }}>
                     <div role="button" class="flex items-center justify-between" {{ stimulus_action('toggle', 'toggle', 'click') }}>
                         <div class="flex items-center space-x-4">
                             <span class="text-2xl leading-none font-semibold">Teilnehmer:in {{ participant.index }}: {{ participant.firstName }} {{ participant.lastName }}</span>
-                            {% if participant.status != 'F' %} <span class="inline-block px-2 py-1 text-xs bg-red-500 text-white">storniert</span>{% endif %}
+                            {% if participant.status == 'S' %} <span class="inline-block px-2 py-1 text-xs bg-red-500 text-white">storniert</span>{% endif %}
                         </div>
                         <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-6 h-6" {{ stimulus_target('toggle', 'icon') }}>
                             <path stroke-linecap="round" stroke-linejoin="round" d="M8.25 4.5l7.5 7.5-7.5 7.5" />
@@ -123,7 +123,7 @@
                     </div>
                     <div class="hidden" {{ stimulus_target('toggle', 'toggle') }}>
                         <div class="flex flex-col space-y-4 pt-4">
-                            {% if participant.status != 'F' %}
+                            {% if participant.status == 'S' %}
                                 {% set surcharges = bookingData.surchargesForParticipant(participant.index)  %}
                                 {% if surcharges|length > 0 %}
                                     <div>
@@ -209,7 +209,7 @@
                                         Hin-/Rückreise
                                     </h3>
                                     <fieldset class="grid grid-cols-1 md:grid-cols-2 gap-x-8 gap-y-4">
-                                        <div class="space-y-2" {{ stimulus_controller('select-toggle', { 'show': ['BUS'], 'visible': participant.transportationServiceTo.subType == 'BUS' }, { 'hidden': 'hidden' }) }}>
+                                        <div class="space-y-2" {{ stimulus_controller('select-toggle', { 'show': ['BUS'], 'visible': participant.transportationServiceTo is not null and participant.transportationServiceTo.subType == 'BUS' }, { 'hidden': 'hidden' }) }}>
                                             {{ form_row(child.transportationServiceTo) }}
                                             {% if child.pickup is defined %}
                                                 <div {{ stimulus_target('select-toggle', 'container') }}>
@@ -250,7 +250,7 @@
                         </div>
                     </div>
                 </div>
-                {% if participant.status == 'F' %}
+                {% if participant.status != 'S' %}
                     <button type="submit"
                             class="button bg-button bg-button--secondary" {{ stimulus_action('loading', 'toggle', null, { 'scroll': true }) }}>
                         Aktualisieren