Fix migration

install/migrations/v330/ServiceMessagesImprovements/UpdateExistingServiceMessagesLocations.php

@@ -2,14 +2,11 @@
 
 namespace v330\ServiceMessagesImprovements;
 
-
-use BusinessLogic\ServiceMessages\ServiceMessageLocation;
-
 class UpdateExistingServiceMessagesLocations extends \AbstractUpdatableMigration {
 
     function innerUp($hesk_settings) {
         $this->executeQuery("INSERT INTO `" . hesk_dbEscape($hesk_settings['db_pfix']) . "mfh_service_message_to_location` (`service_message_id`, `location`)
-            SELECT `id`, '" . hesk_dbEscape(ServiceMessageLocation::CUSTOMER_HOME) . "' FROM `" . hesk_dbEscape($hesk_settings['db_pfix']) . "service_messages`");
+            SELECT `id`, 'CUSTOMER_HOME' FROM `" . hesk_dbEscape($hesk_settings['db_pfix']) . "service_messages`");
     }
 
     function innerDown($hesk_settings) {