We need to handle upgrading the tables we attach to the lib object in case of multiple different instances of LibPlayerSpells.

Yes, I thought exactly about that. Currently there is no such a check in place.

Do we really need to upgrade them ? I mean: if the previous version of LibPlayerSpells is too old (e.g. anterior to the version where the new format was introduced), just wipe the tables and start over with the new data.

Which commit broke the API/data format and which was the library version before and after ?

Edit : there, 7 and 8.

So I think that clearing the data if the previous version was lower than 8 is what should be done.

Closed with a2c474a