The error, note, and warning message numbers (IDs) used in the message action for active links and filters must be unique. This requirement helps with debugging. For internationalization (I18N) support, enter messages into the AR System Message Catalog form so that they can be translated to different languages. The message ID is one of the keys used to look up the appropriate message for a language. These values should not conflict with other applications, so these values should be registered. For more information, see Localizing message components of a form view.
Many applications maintain their own Application Message Catalog form with records that have message strings that are mostly shown on dialog boxes (display-only forms) in the form of questions to end users. The message ID records should be associated with a Used By value of String Catalog.