I traded a used Cubase 10. When I entered the download access code, it said that the account was in use. The other party’s account has Cubase 12 and 13 versions, so I cannot take over. What should I do?
That sounds like the user traded you the license they used to update to Cubase 12 which is marked in the licenser as “updated” and cannot be transferred.
If you post a Pic of the elicenser this can be confirmed