The update will not be retroactive.
But will the followers in the chests be affected?
If affected, add a command to relocate followers to your inventory. At least temporarily, for a week.
Increase the limit to 300.
No one should have 400 guards, but 10 people in a clan cannot live on just 10 each.
Each person in a clan generates 30 followers. it’s fairer than 10.
The 1 player clan has a limit of 50, 2 players 60, 3 players 90 and so on.
Between having a horse and having an adequate amount of followers. I pick my followers without thinking twice