diff --git a/app/Imports/EventCalendarImport.php b/app/Imports/EventCalendarImport.php
index e572e1d..20c99bb 100644
--- a/app/Imports/EventCalendarImport.php
+++ b/app/Imports/EventCalendarImport.php
@@ -35,6 +35,9 @@ class EventCalendarImport implements ToModel, WithHeadingRow
             return false;
         }
         $pattern_id = ParkingPattern::getId($pattern_name);
+        if (!$pattern_id) {
+            return false;
+        }
         if (EventCalendar::query()->whereIn('status', [0, 1])->where(
             'pattern_id',
             $pattern_id