Hi Fred,
The school function is already mapped on the site outline: https://www.openstreetmap.org/way/850432284
So make sure not to create duplicate information by enriching just the building. I've removed the duplicate info now.
Are you sure it's only 'primaire'? According to official data, there is also a 'maternelle' here, so it would be school=kindergarten;primary if that's correct