diff --git a/PROMS/Volian.Controls.Library/DisplayTags.cs b/PROMS/Volian.Controls.Library/DisplayTags.cs
index ed28b11a..2734798c 100644
--- a/PROMS/Volian.Controls.Library/DisplayTags.cs
+++ b/PROMS/Volian.Controls.Library/DisplayTags.cs
@@ -728,7 +728,8 @@ namespace Volian.Controls.Library
 			MyEditItem.SaveContents();
 			StepConfig sc = CurItemInfo.MyConfig as StepConfig;
 			// if the changeID changed, then reset the change bar override
-			if (sc.Step_ChangeID != tbChgID.Text)
+			// B2021-029: don't change changeid if the config & text box are both empty
+			if (sc.Step_ChangeID != tbChgID.Text && sc.Step_ChangeID != null && tbChgID.Text != "")
 			{
 				sc.Step_ChangeID = tbChgID.Text;
 				sc.Step_CBOverride = null;