Guild Wars 2

I’m on Nevermore IV: The Raven Spirit.

-I’ve completed all steps up to “The Hatchling” where you are supposed to jump into the lava of Mount Maelstrom.
-I deleted the items as they’ve cluttered my inventory, as per every collection.
-It’s always the same, once it unlocks in your collection, you don’t need it anymore, or so I thought.
-It seems that this is the one anomaly?
-You need to have the four prior items before jumping into the lava?
-When I jump into the lava, without the items, the achievement doesn’t unlock.
-Do I have to recreate the items that I’ve already unlocked or is this an issue with the collection?

Help?

Bring your Raven Egg, Incubation Box, Spider Silk Insulation, and Warming Stone to the lava in Mount Maelstrom. From Maelstrom’s Waypoint, jump into the lava that the Megadestroyer spawns in, and be rewarded with a Raven Chick.

The game is inconsistent about identifying items that are okay to delete (plus: some start off being not okay to delete and become okay to delete, without the item changing).

You should be able to visit GM Craftsman Hobbs in Lion’s Arch and tell him you’re missing some items. If he can’t replace them (for karma), you’ll have to contact support:
https://help.guildwars2.com/anonymous_requests/new