SAP Message /SAPSMOSS/01016 - Notification &1 is unknown at SAP

Diagnosis
The function you activated could not be executed.
Activated function,,Diagnosis
Send to SAP,,The notification was saved without
,,being sent to SAP.
Update notification,,The notification was not updated to
,,reflect the SAP version.
Check for changes,,The system cannot compare the R/3
,,notification with the current version
,,at SAP.
Request list of R/3,,The R/3 notifications you sent to SAP
notifications contained,,cannot be updated.
in OSS,,

Procedure
Check the notification number.