TypeError: Cannot read property 'id' of undefined in Insomnia when trying to delete using http

I am fairly new to using Express and I am trying to set up the Delete function for my database. I am using the MERN stack. All of my CRUD operations work when I test them with Insomnia, except for the Delete operation.

This is the code block that seems to be giving me a problem.

router.route('/:id').delete((res, req) => {
    Post.findByIdAndDelete(req.params.id)
        .then(() => res.json('Post deleted'))
        .catch(err => res.status(400).json('Error: ' + err));
});

RETURNS: TypeError: Cannot read property 'id' of undefined

The thing that is throwing me is that this code block grabs the req.params.id without problem.

router.route('/:id').get((req, res) => {
    Post.findById(req.params.id)
        .then(post => res.json(post))
        .catch(err => res.status(400).json('Error: ' + err));
});

If someone could help me out I would greatly appreciate it.