An item with the same key has already been added. Key: "Plugin Name"

Development Pipeline & Plugins
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when you Want Build Package This error has shown :
[An item with the same key has already been added. Key: “Plugin Name” ]

For solution you should delete same plugin in Your Epicgame Folder .
This Path : C:\Program Files\Epic Games\UE_5.0\Engine\Plugins

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Out of all the searches this was the one that worked for me to find the plugin packaging error for the HoudiniNiagara plugin somehow being in the main Plugin folder as well as being inside an FX folder twice. I only found it by doing a FileLocator Pro search for to find. Thank you, likely couldn’t have figured this out without your shared knowledge.

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Thank you <3

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you’re welcome.

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you’re welcome .