If veteran account characters have not used their 600 day ship token before achieving level 61 both tokens will be spent when purchasing a single ship.
This is particularly a problem on Jem'Hadar characters who are likely to hit level 61 (especially with the veteran xp bonus) before getting the opportunity to use the veteran token
Comments
https://www.reddit.com/r/sto/comments/9ck3f7/claim_600_day_vet_ship_token_on_jem_character/