If an Exile cannot replace all their warbands when offered citizenship, what happens to the rest?

Question

Accepted Answer

A Citizen has only purple warbands, so an Exile cannot keep a mix of colours. When a supply is short, take or gain as many components as possible, as rule 9.3 says. The Exile chooses which of their old warbands are removed from the game; the rest become purple.

Oath: Chronicles of Empire & Exile

If an Exile cannot replace all their warbands when offered citizenship, what happens to the rest?