diff --git a/src/PickerPanel.tsx b/src/PickerPanel.tsx
index a1551aee1..55fde1585 100644
--- a/src/PickerPanel.tsx
+++ b/src/PickerPanel.tsx
@@ -347,7 +347,7 @@ function PickerPanel<DateType>(props: PickerPanelProps<DateType>) {
     onViewDateChange: setViewDate,
     sourceMode,
     onPanelChange: onInternalPanelChange,
-    disabledDate: picker === mergedMode ? disabledDate : undefined,
+    disabledDate: mergedMode !== 'decade' ? disabledDate : undefined,
   };
   delete pickerProps.onChange;
   delete pickerProps.onSelect;
diff --git a/tests/panel.spec.tsx b/tests/panel.spec.tsx
index 0cb5c245a..013909be4 100644
--- a/tests/panel.spec.tsx
+++ b/tests/panel.spec.tsx
@@ -315,25 +315,6 @@ describe('Picker.Panel', () => {
         expect(onPanelChange).toHaveBeenCalled();
       });
 
-      // decade is not a picker, but we still test here in case will support
-      it('picker', () => {
-        const onPanelChange = jest.fn();
-        const wrapper = mount(
-          <MomentPickerPanel
-            picker={'decade' as any}
-            mode="decade"
-            onPanelChange={onPanelChange}
-            disabledDate={date => date.year() === 1900}
-          />,
-        );
-
-        wrapper.selectCell('1900-1909');
-        expect(onPanelChange).not.toHaveBeenCalled();
-
-        wrapper.selectCell('1910-1919');
-        expect(onPanelChange).toHaveBeenCalled();
-      });
-
       it('not trigger when same panel', () => {
         const onPanelChange = jest.fn();
         const wrapper = mount(<MomentPickerPanel onPanelChange={onPanelChange} />);
diff --git a/tests/range.spec.tsx b/tests/range.spec.tsx
index 2048113d8..d09f9ff60 100644
--- a/tests/range.spec.tsx
+++ b/tests/range.spec.tsx
@@ -1744,4 +1744,18 @@ describe('Picker.Range', () => {
       .simulate('click');
     expect(wrapper.find('.rc-picker-year-btn').text()).toEqual('1990');
   });
+
+  // https://github.com/ant-design/ant-design/issues/26390
+  it('month panel should be disabled', () => {
+    const wrapper = mount(<MomentRangePicker />);
+    wrapper.openPicker();
+    wrapper.selectCell(15);
+
+    wrapper
+      .find('.rc-picker-month-btn')
+      .first()
+      .simulate('click');
+    expect(wrapper.findCell('Jan').hasClass('rc-picker-cell-disabled')).toBeTruthy();
+    expect(wrapper.findCell('Dec').hasClass('rc-picker-cell-disabled')).toBeFalsy();
+  });
 });