When the guy at the white phial asks me to get mammoth tusk powder and the briar heart for his dying master.

I go to the tower i kill the briarheart and take his heart however it is not ticked.

This maybe because i already had one of the briar hearts in my inventory thus i cannot complete the quest. Is there a way to get around this bug so i can complete the quest please reply.

Help ?

Drop them all and pick them back up. Or the mark may only be "ticked" when you deliver the heart to the guy. Not sure, though, haven't done this quest yet.

I have tried this i cant drop the heart "Quest items cannot be removed from your inventory at this time!"
and i have went to him he says nothing.

Thank you

Unless you have the PC version and you can use console commands, than you will not be able to finish that quest until a patch comes out. Your only hope is to revert to an earlier save. I would also advise not to pick anymore briar hearts, cause they will just constantly stack and you will not be able to remove them, until said quest is complete.

You can't fix that bug without console commands or without reverting to an older save

Yeah, nothing you can do, I had the same issue. It happens if you have a heart in your possession when you get the quest I think. Annoying but nothing you can do if you're not on PC.

Quests like this one have taught me from my second play through on, don't go in anything unless it's quest related and don't pick anything up until told to.

i kinda agree, going in places isn't as much a problem as picking up quest related items, cause they get stuck in your inventory, so i do the same thing i avoid picking up lots of things, those bard college instruments, briar hearts, staff of charming etc.

Yeah and it's bad when you don't know that it's a quest item (Cleansing the Fane book) or it becomes a quest item afterwards (Briar Heart)