I am trying to redirect select URLs from one website to another website.

Some of my redirects are working, others are not.

As an example, this is a redirect that doesn't work:

Redirect 301 /3d-metrology-solutions/3d-scanners/atos-q .html

When the redirect triggers, it produces this URL:

.html/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d-scanners/3d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And that then generates a 403 error on the destination website.

I'm not understanding how all the extra /3d-scanners/ are being added to the redirect URL.

Anyone have advice?