Infinite Redirect Loop

Hi,

Good day.

I have 1000 pages that I want to redirect to its new url. I tried using regex to redirect the pages but its generating a ‘TO MANY REDIRECTS’ issue.

Here is an example link:
https://techsupportpro.com/new-york/madison/server-issue/

and we want to redirect it to:
https://techsupportpro.com/usa/new-york/madison/server-issue/

Source (Regex)
^\/(.*)\/(.*)\/unit-issue\/

Target URL (Regex)
https://techsupportpro.test/usa/$1/$2/unit-issue/

What is the proper regex value for this of URL redirects? Hoping you can help.

Thank you in advance.