It was confusing, but after many tries i figured it out.
(I’m going to use “Example” as an example map)
1: Go to Documents>UnrealProjects>MyProject>Saved>Autosaves>Game>ThirdPersonBP>Maps
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Copy the latest Example_Auto.umap and Example_BuiltData_Auto.uasset
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Paste them into Documents>UnrealProjects>MyProject>Content>ThirdPersonBP>Maps
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Remove any old instances of that map
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Rename Example_Auto.umap to Example.umap and do the same to Example_BuiltData
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Open Unreal Engine
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Open your project
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See if it works
If it doesnt work try it again with an older autosave
Hope this helps someone!