diff --git a/assets/js/backend_calendar_table_view.js b/assets/js/backend_calendar_table_view.js
index b45f270a..de7cf466 100755
--- a/assets/js/backend_calendar_table_view.js
+++ b/assets/js/backend_calendar_table_view.js
@@ -245,23 +245,23 @@ window.BackendCalendarTableView = window.BackendCalendarTableView || {};
             var data;
 
             // If id_role parameter exists the popover is an working plan exception.
-            if (lastFocusedEventData.data.hasOwnProperty('id_roles')) {
+            if (lastFocusedEventData.data.workingPlanException) {
                 // Do not display confirmation prompt.
                 url = GlobalVariables.baseUrl + '/index.php/backend_api/ajax_delete_working_plan_exception';
 
                 data = {
                     csrfToken: GlobalVariables.csrfToken,
                     working_plan_exception: lastFocusedEventData.start.format('YYYY-MM-DD'),
-                    provider_id: lastFocusedEventData.data.id
+                    provider_id: lastFocusedEventData.data.provider.id
                 };
 
                 $.post(url, data)
                     .done(function () {
                         $('#message-box').dialog('close');
 
-                        var workingPlanExceptions = JSON.parse(lastFocusedEventData.data.settings.working_plan_exceptions);
+                        var workingPlanExceptions = JSON.parse(lastFocusedEventData.data.provider.settings.working_plan_exceptions);
                         delete workingPlanExceptions[lastFocusedEventData.start.format('YYYY-MM-DD')];
-                        lastFocusedEventData.data.settings.working_plan_exceptions = JSON.stringify(workingPlanExceptions);
+                        lastFocusedEventData.data.provider.settings.working_plan_exceptions = JSON.stringify(workingPlanExceptions);
 
                         // Refresh calendar event items.
                         $('#select-filter-item').trigger('change');