Reset maintenance display Boxer III 2.2 HDI

Hello, can someone tell me how I can reset my maintenance indicator for my Peugeot Boxer III 2.2 HDI? Currently, the indication “Motor oil change” comes briefly in the indicator when starting the engine and the red oil can blinks about 3-4 times. But an oil change was made about 5000 km ago and the oil level is also i.o., oil indicator in the display shows 5 out of 6 display points. Does one of you know if it has to do with the provision of the maintenance indicator? Hope for answers.