Peugeot 208 Service light

Hello, I have a Peugeot 208 vehicle. The service light has been on for the last 1 week but there is no other warning light or message. It also says -300 km on the odometer. Of course, this value continues to change in an increasingly negative way. It says it probably passed the annual maintenance, but I'm not sure. Is this just a sign that annual maintenance has passed? Or could it be any other malfunction? If it's just the annual maintenance light I'll reset it and be on my way

Since the annual maintenance has passed, sir.

Thank you sir.