As a CBSE student, if you obtained your APAAR ID by selecting "None" as the identity type, it should be valid as long as it was successfully generated. However, since your school previously faced issues due to a name mismatch, it's advisable to verify the details linked to your APAAR ID. Check if your name and other information match official records. If discrepancies exist, contact your school or the relevant authorities to rectify them to avoid any potential issues in the future.