diff --git a/application/Espo/Resources/metadata/clientDefs/WorkingTimeCalendar.json b/application/Espo/Resources/metadata/clientDefs/WorkingTimeCalendar.json
index 9691cd9295..8dd94885f1 100644
--- a/application/Espo/Resources/metadata/clientDefs/WorkingTimeCalendar.json
+++ b/application/Espo/Resources/metadata/clientDefs/WorkingTimeCalendar.json
@@ -1,6 +1,9 @@
 {
     "controller": "controllers/record",
     "searchPanelDisabled": true,
+    "massUpdateDisabled": true,
+    "mergeDisabled": true,
+    "massRemoveDisabled": true,
     "iconClass": "fas fa-calendar-week",
     "menu": {
         "list": {
diff --git a/application/Espo/Resources/metadata/clientDefs/WorkingTimeRange.json b/application/Espo/Resources/metadata/clientDefs/WorkingTimeRange.json
index 1e34e716ae..44466a10d1 100644
--- a/application/Espo/Resources/metadata/clientDefs/WorkingTimeRange.json
+++ b/application/Espo/Resources/metadata/clientDefs/WorkingTimeRange.json
@@ -3,6 +3,8 @@
     "viewSetupHandlers": {
         "record/edit": "handlers/working-time-range"
     },
+    "mergeDisabled": true,
+    "massUpdateDisabled": true,
     "menu": {
         "list": {
             "buttons": [