--- /Websites/tourlinkconference.dev/dev/sites/all/modules/signup/signup.module
+++ signup-patch_initialize_event.module
@@ -327,7 +327,7 @@
     include(SIGNUP_PATH .'/signup_event_5.x-2.inc');
   }
   else if (module_exists('event')) {
-    include(SIGNUP_PATH .'/signup_event_5.x-1.inc');
+    include_once(SIGNUP_PATH .'/signup_event_5.x-1.inc');
   }
   else if (module_exists('date')) {
     // include(SIGNUP_PATH .'/signup_date.inc');