diff --git a/src/lib/Event.svelte b/src/lib/Event.svelte
index fc168f3..3f85c49 100644
--- a/src/lib/Event.svelte
+++ b/src/lib/Event.svelte
@@ -57,7 +57,9 @@
   {/if}
   <div class="mt-2 text-sm flex flex-wrap gap-2">
     <div><EventTypeLabel event={e} /></div>
-    <div class="text-sm my-auto">{trackRender(e.track)}</div>
+    {#if e.track}
+      <div class="text-sm my-auto">{trackRender(e.track)}</div>
+    {/if}
     {#if duration}<div class="text-xs my-auto">{duration}m</div>{/if}
   </div>
   {#if getChildrens(e).length > 0}
diff --git a/src/routes/lide.svelte b/src/routes/lide.svelte
index 766df2a..9dcc0cd 100644
--- a/src/routes/lide.svelte
+++ b/src/routes/lide.svelte
@@ -31,6 +31,9 @@
   }
 
   function trackRender(trackId) {
+    if (!trackId) {
+      return "n/a";
+    }
     const track = $bundle.spec.tracks.find((t) => t.id === trackId);
     return track.shortname || track.name;
   }
@@ -76,9 +79,11 @@
             <SvelteMarkdown source={s.orgs} {renderers} />
           </div>
         {/if}
-        <div class="mt-4">
-          Sekce: {s.tracks.map((t) => trackRender(t)).join(", ")}
-        </div>
+        {#if s.tracks && s.tracks.length > 0}
+          <div class="mt-4">
+            Sekce: {s.tracks.map((t) => trackRender(t)).join(", ")}
+          </div>
+        {/if}
         {#if s.twitter}
           <div class="mt-2">
             Twitter: <a