update

app/Models/CourseAppointmentTotal.php

@@ -51,7 +51,7 @@ class CourseAppointmentTotal extends SoftDeletesModel
                 'start_time' => $start_date,
                 'end_time' => date('Y-m-d H:i:s', $oneYearLaterTimestamp)
             ];
-            self::firstOrcreate($where, $data);
+            self::firstOrCreate($where, $data);
         }
         return true;
     }