Grafana bar graph disappears after unit change of entity from ml to l

Hi everybody,
I am using the grafana integration to visualize oil consumption of my heating (using the bar graph). Some weeks ago I changed the unit of the entity for oil consumption from “ml” to “l”. Since then the bar graphs in grafana had disappered. Can anybody figure out a solution?
Thanks in advance!

Solution: I deleted the bar graph and set up a new visualization with the same configuration. The data showed up. So indeed it was a scaling issue!