Index: Ringtoets/Integration/src/Ringtoets.Integration.Forms/Views/FailureMechanismContributionView.cs
===================================================================
diff -u -r3efbdf5afcb5edf2b5207ecee83defaf2af5a48c -r9e46def3407688d9e2905fd9a55edaecd14c49bd
--- Ringtoets/Integration/src/Ringtoets.Integration.Forms/Views/FailureMechanismContributionView.cs	(.../FailureMechanismContributionView.cs)	(revision 3efbdf5afcb5edf2b5207ecee83defaf2af5a48c)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Forms/Views/FailureMechanismContributionView.cs	(.../FailureMechanismContributionView.cs)	(revision 9e46def3407688d9e2905fd9a55edaecd14c49bd)
@@ -350,7 +350,7 @@
                 }
                 else
                 {
-                    probabilityDistributionGrid.RestoreCell(eventArgs.RowIndex, eventArgs.ColumnIndex);
+                    probabilityDistributionGrid.RestoreCell(eventArgs.RowIndex, eventArgs.ColumnIndex, true);
                 }
             }
             else
Index: Ringtoets/Integration/test/Ringtoets.Integration.Forms.Test/Views/FailureMechanismContributionViewTest.cs
===================================================================
diff -u -r61849787ccd3c614e8ad17e2bf78a69aeb50d3f6 -r9e46def3407688d9e2905fd9a55edaecd14c49bd
--- Ringtoets/Integration/test/Ringtoets.Integration.Forms.Test/Views/FailureMechanismContributionViewTest.cs	(.../FailureMechanismContributionViewTest.cs)	(revision 61849787ccd3c614e8ad17e2bf78a69aeb50d3f6)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Forms.Test/Views/FailureMechanismContributionViewTest.cs	(.../FailureMechanismContributionViewTest.cs)	(revision 9e46def3407688d9e2905fd9a55edaecd14c49bd)
@@ -1129,6 +1129,7 @@
             var enabledBackColor = Color.FromKnownColor(KnownColor.White);
             var enabledForeColor = Color.FromKnownColor(KnownColor.ControlText);
 
+            Assert.IsTrue(cell.ReadOnly);
             Assert.AreEqual(enabledBackColor, cell.Style.BackColor,
                             "Color does not match for column index: " + cell.ColumnIndex);
             Assert.AreEqual(enabledForeColor, cell.Style.ForeColor,
@@ -1140,6 +1141,7 @@
             var irrelevantMechanismBackColor = Color.FromKnownColor(KnownColor.DarkGray);
             var irrelevantMechanismForeColor = Color.FromKnownColor(KnownColor.GrayText);
 
+            Assert.IsTrue(cell.ReadOnly);
             Assert.AreEqual(irrelevantMechanismBackColor, cell.Style.BackColor,
                             "Color does not match for column index: " + cell.ColumnIndex);
             Assert.AreEqual(irrelevantMechanismForeColor, cell.Style.ForeColor,