We’re on DL83 an A332 4 Dec CDG>ATL and had picked 4A/5A. Having coffee this morning on the patio and I decided to check our flights and discovered they’d moved us to 8J/9J. Not seats we would have picked ourselves and of course no explanation or reason for the change. I moved us to 5C/5G. When we booked flight was also a A332 so basic plane the same unless there was internal configuration/upgrade change I’m not aware of.