RADAR instructs aircraft XY-ABC: 'X-BC reset squawk 1015'. What does this mean:

Question

Question ATPL - Airline Transport Pilot license - VFR Communications

QuizVDS · Accepted Answer

X-BC is requested to reselect SSR code 1015

QuizVDS · Answer

X-BC has been identified by SSR code 1015

QuizVDS · Answer

X-BC is requested to set new code 1015

QuizVDS · Answer

X-BC has been identified at 10:15 (UTC)

Id 99 - ATPL - RADAR instructs aircraft XY-ABC: 'X-BC reset squawk 1015'. What does this mean: