Message type: E = Error
Message class:  LSOPV - Training Management (Copy of Message Class PV) 
Message number: 422
Message text: Course demand already exists -> only changes are possible
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
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The SAP error message LSOPV422, which states "Course demand already exists -> only changes are possible," typically occurs in the context of SAP's Logistics and Supply Chain Management modules, particularly when dealing with course demand planning or course scheduling in the SAP system.
Cause: This error message indicates that there is already an existing demand for a specific course in the system. When you attempt to create a new demand for the same course, the system recognizes that a demand record already exists and therefore restricts the action to only allow changes to the existing record rather than creating a new one.
Solution: To resolve this error, you can take the following steps: Check Existing Course Demand: Navigate to the relevant transaction or report where you can view existing course demands (e.g., transaction codes like LS01N for creating course demands or LS02N for changing them). Search for the course in question to confirm that a demand record
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