Build cook error: trying to reference a deleted level

I’m getting this error. It’s referencing a level called “TEST_01” that I deleted a long time ago.

How do I completely exclude this level from the build? Or is there another way to get rid of it? Many thanks for any answers.

Try right clicking on your content folder in editor and pick

-Fix up redirectors (old versions of Unreal)
fixup old

  • Update Redirector References (newer versions of Unreal)
    redir