If I wanted sell my drone, how can I do for disassociate it from my DJI profile and/or account to avoid all future risks?

Hello and good day Alberto V. Thank you for reaching out and for the inquiry. The device icon under you Avatar is synced with the activation system. Once you activate one DJI device with the same DJI Forum account. The device will be displayed there, but it cannot be removed by the customer themselves, like the activation information can not be deactivated in the server. Thank you.