diff --git a/src/pages/practise-one.vue b/src/pages/practise-one.vue
index 098fbaa..647ca66 100644
--- a/src/pages/practise-one.vue
+++ b/src/pages/practise-one.vue
@@ -61,6 +61,10 @@ async function onReceiveMessage(messages = []) {
       }, 200);
     } else if (msg.constructor === MESSAGETYPES.ShootSyncMePracticeID) {
       if (practiseId.value && practiseId.value === msg.practice.id) {
+        if (timer.value) {
+          clearInterval(timer.value);
+          timer.value = null;
+        }
         setTimeout(() => {
           start.value = false;
           practiseResult.value = {