Moving back from 2.7 to 2.22

First i installed prometheus from the repository and it comes a 2.7… version. I started to use prometheus & grafana with this version. later on following a recommandation in a tutorial i choosen to uninstall the 2.7… and installed a 2.22.0.version.
I lost all my previous data and prometheus & grafana started like a virgin setting…In the log i see that prometheus try to load some datas but table is locked…
What does this mean ?
are the table created by 2.7 unable to be read by 2.22.0?
Wat i think…
And you?

regards,
knasson

Hi,

While uninstalling did you keep the database ? If you uninstalled completely, i would suggest to remove the data source from Grafana and readding it.

Good Luck