diff --git a/public/js/app.js b/public/js/app.js
index c4f3e5d..8c6ad00 100644
--- a/public/js/app.js
+++ b/public/js/app.js
@@ -7,7 +7,7 @@
   var currentVideoPlaying = false, pileCanvas, pileCtx;
   var FRAME_PAD_RATIO = 0.03, FRAME_BOTTOM_RATIO = 0.10, FRAME_COLOR = '#ede8df';
   var wsConn = null, clientId = null, isSleeping = false;
-  var persistentId = (function(){ var k='frambe_pid'; var v=localStorage.getItem(k); if(vi docker-compose.yml ){ v='fp-'+Math.random().toString(36).substr(2,9)+'-'+Date.now().toString(36); localStorage.setItem(k,v); } return v; })();
+  var persistentId = (function(){ var k='frambe_pid'; var v=localStorage.getItem(k); if(!v){ v='fp-'+Math.random().toString(36).substr(2,9)+'-'+Date.now().toString(36); localStorage.setItem(k,v); } return v; })();
   var $setupScreen=document.getElementById('setup-screen'),$slideshowScreen=document.getElementById('slideshow-screen'),$connectionStatus=document.getElementById('connection-status'),$setupContent=document.getElementById('setup-content'),$setupError=document.getElementById('setup-error'),$errorDetail=document.getElementById('error-detail'),$albumsList=document.getElementById('albums-list'),$btnStart=document.getElementById('btn-start'),$bgBlur=document.getElementById('bg-blur'),$mainFrame=document.getElementById('main-frame'),$mainPhoto=document.getElementById('main-photo'),$mainVideo=document.getElementById('main-video'),$clock=document.getElementById('clock'),$dateDisplay=document.getElementById('date-display'),$exifInfo=document.getElementById('exif-info'),$progressFill=document.getElementById('progress-fill'),$overlay=document.getElementById('overlay'),$btnSettings=document.getElementById('btn-settings'),$progressBar=document.getElementById('progress-bar');
 
   // === WEBSOCKET ===