Warlock Fel Fire Quest

[Valefore]

WoW Freakz link:
Bug description: Jubeka Shadowbreaker isn't in the Altar Of Damnation
Proof:
Hello so here's the issue
I finished the Fel Fire quest for Warlock but i forgot to absorb the Energy from Kanrethad while i was still in the Black Temple however Jubeka told me she will be in the Altar Of Damnation in Shadowmoon Valley if i wanted to reabsorb the energy again or to undo it and restore back the oroginal one
So i went there but she's nowhere to be found which sucks so i got another Sealed Tome but when i open it it says You Have Already Done That Quest
Thank you very much for considering and have a good day