add reload cache button

src/sheet/M1.cls

@@ -152,6 +152,14 @@ Private Sub Validate(ws As Worksheet, ByVal rowNum As Long, ByVal lastDataRow As
         Exit Sub
     End If
 
+    ' Check if M2 uses this M1 kukan code
+    Dim m2Cache As Object: Set m2Cache = GetM2Cache()
+    If Not m2Cache.Exists(cValue) Then
+        ws.Cells(rowNum, errorCol).Value = "The section details are not registered for the corresponding section"
+        ws.Range("C" & rowNum).Interior.Color = RGB(255, 128, 0)
+        Exit Sub
+    End If
+
     ' Validation passed - clear error
     ws.Cells(rowNum, errorCol).ClearContents
 End Sub