Hi!

I faced with issue "ERRTOOMANY_REDIRECTS" in browser when I tried to open page.

I am using umbraco 10.8.1 and SEOChecker 10.0.5.

After investigation I found out the following: this behaviour was caused by enabling "RedirectWhenNodeExists" setting in RedirectConfig ("Redirect when node exists" setting in backoffice). This setting allows SEOChecker.Providers.UrlProviders.UrlRewriteRedirectsProvider.RewriteUrl to rewrite Url, but in some cases it creates an endless loop of redirects.

Steps to reproduce:

1. Create fresh umbraco app (10.8.1)
2. Install SEOChecker (10.0.5)
3. Go to SEO tab -> Settings -> General Settings -> Redirect Settings and enable "Redirect when node exists" option
4. Create doc type Foo (whatever) and allow it as root and allow create Foo doc type under Foo doc type
5. Create Foo node as root in content tree and name it as "Root", save it and publish
6. Under "Root" node create new Foo node "Test", save it and publish (note: url to page is "/test")
7. Open "/test" in broser and make sure page works like a charm
8. Rename node "Test" to "Test 1" (note: url to page become "/test1")
9. Open "/test1" and make sure page works like a charm
10. Rename node "Test 1" to "Test" (note: url to page become "/test", and now there are two url redirects: "/test", "/test1")
11. Open "/test1" and there is an error in browser: "ERRTOOMANY_REDIRECTS"

To fix this issue I can suggest do not to store redirects if them have the same urls. Maybe I am wrong, but as I can see it is not good behaviour out of the box.

Thanks!