Many of my alts have unlearned profession that were used at the beginning. (For Artisan Acuity grind)
And despite those profession are not there anymore the panel is still showing those as being at max concentration.

It's not very important but when you have a lot of alts it makes the panel even more crowded than it should be.

you can right click and remove such entries from the tracker or do a full resetdb
for scan and more there is this requests #371