diff --git a/src/Layers/GB/BaseApp/Local/Foundation/Address/PostcodeConfigurationPage.Page.al b/src/Layers/GB/BaseApp/Local/Foundation/Address/PostcodeConfigurationPage.Page.al
index c193bfd742a..a5b38238c34 100644
--- a/src/Layers/GB/BaseApp/Local/Foundation/Address/PostcodeConfigurationPage.Page.al
+++ b/src/Layers/GB/BaseApp/Local/Foundation/Address/PostcodeConfigurationPage.Page.al
@@ -86,7 +86,8 @@ page 10501 "Postcode Configuration Page"
             Rec.SaveServiceKey(DisabledTok);
         end;
 
-        PrevValue := Rec.GetServiceKey();
+        ServiceKeyText := Rec.GetServiceKey();
+        PrevValue := ServiceKeyText;
     end;
 
     trigger OnQueryClosePage(CloseAction: Action): Boolean
diff --git a/src/Layers/W1/BaseApp/Foundation/Address/PostcodeConfigurationPageW1.Page.al b/src/Layers/W1/BaseApp/Foundation/Address/PostcodeConfigurationPageW1.Page.al
index bfe528fbe17..4254590fc96 100644
--- a/src/Layers/W1/BaseApp/Foundation/Address/PostcodeConfigurationPageW1.Page.al
+++ b/src/Layers/W1/BaseApp/Foundation/Address/PostcodeConfigurationPageW1.Page.al
@@ -82,7 +82,8 @@ page 9143 "Postcode Configuration Page W1"
             Rec.SaveServiceKey(DisabledTok);
         end;
 
-        PrevValue := Rec.GetServiceKey();
+        ServiceKeyText := Rec.GetServiceKey();
+        PrevValue := ServiceKeyText;
     end;
 
     trigger OnQueryClosePage(CloseAction: Action): Boolean