diff --git a/src/EventCreationService.php b/src/EventCreationService.php
index 97e0ae3df7f42a0ef4d3a6d5007573a82c74fdcd..27fd60c80b14ebb987969eaac6bb0dd1f5a17bc4 100644
--- a/src/EventCreationService.php
+++ b/src/EventCreationService.php
@@ -207,6 +207,7 @@ class EventCreationService {
 
     $config['type'] = $user_input['recur_type'];
 
+    $config['excluded_dates'] = $config['included_dates'] = [];
     if (!empty($user_input['excluded_dates'])) {
       $config['excluded_dates'] = $this->getDatesFromForm($user_input['excluded_dates']);
     }