https://www.wowhead.com/quest=12297/of-traitors-and-treason

Could not figure out what the pre quest is. Not available as a fresh 80.

Not to be confused with quest=12171/of-traitors-and-treason

https://discord.com/channels/263036731165638656/579966856085897216/1001737373278814249 might be relevant

The TL;DR is

1. The quests in this chain https://www.wowhead.com/wotlk/quest=11157 turn the 12171 version off.
2. The 12297 alternative version only becomes available after https://www.wowhead.com/wotlk/quest=11250 (final quest of a long series) has been completed.