My situation was not clearing a location...in my case it was the second active location of the "Into the Pit" quest...I was not ready to get to "The Bridge of Khazad Dum" because I didn't have enough allies/attachments out to get thru that active location.
I need to stall thru "East Gate" (7 Progress) and "First Hall" (2 Progress) because "The Bridge of KD" doesn't allow me to play cards...which ends up hurting.
What active location / quest card you are on in irrelevent unless the effect of active location / quest card stops you from putting progress tokens.
Once you quested succesfully via normal quest mechanic, you must put difference of willpower and threat as progress tokens.
In your specific case, since next Victory Location is added to staging area rather than added as active location, you could simply choose not to travel to Bridge of Khazad-Dum until you are ready.