Netatmo weather seems to have deleated all my data from yesterday to today morning at 6:30 AM.

As the title says, I’ve had a new weather station installed since Saturday. This morning, when I checked the data to compare graphs, I noticed that all the data from yesterday, along with today’s data up to 6:30 AM, has disappeared. I tried restarting the station, but it didn’t solve the problem. What could be the cause? Any solution?