Maligaro's Spike stuck in my inventory

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Ruzza wrote:

A small issue, but I was wandering about Act 2 and found The Weaver's Chambers. I had no quest that told me to go in, but I was just enjoying myself and ran through the dungeon. At the end, I defeated the Weaver and received Maligaro's Spike, a quest item.

When I returned to the Forest Encampment, Silk had a turn in for the Spike. I received the reward, but the quest item was never removed from my inventory.

Now it's just taking up space.