Next batch of Anniversary Quests requires the new SLuke debuff
...according to datamine, and that's crap.
I will be generous and assume that it will be possible to complete the quest with a slow trickle by using a borrowed G13 SLuke in tier 1 of the next 5 marquee events. It's still crap. If that's not the case, then the quest will be hard-locked until mid-February.
The first batch of Anniversary Quests was doable on day 1 if one had time to spare; the quests weren't gated by Era content which is separated from 98% of the game (1% each for Coliseum and marquee events).
Also, I recall something about Era content not interfereing with upgrading characters in the legacy roster. Anniversary Quests award LSTs, zeta mats, and omicron mats--all of which are irrelevant to Era units; they are used to upgrade Legacy units. An Anniversary Quest that requires Era units is a direct contradiction of this.
CG_Meathead -- this will require a hotfix to change that particular quest to something that can be completed using the Legacy roster.