10 mo wakes up at 5AM

Anybody can tell me what am I doing wrong ? My 10 mo is woke up at 5 today and also on Sunday (not yesterday tho). He was never a good sleeper but I could always put him back to sleep till 7 or 8. He is having 2 naps during the day. Schedule of his naps depends of his wake up time and first nap duration. He always have a nap in the morning and one in the afternoon. Yesterday he napped from 10h30am to 1pm and then again from 4pm to 4h30 (I wanted him to sleep a bit longer but didn't work). Bed time at 7h30pm (but yesterday couldn't sleep until almost 9pm) Thanks for your help 🙏