Duplicate Redirects

The plugin should have a check, if the pages are already redirected.

example:
a redirect of these pages has already been created by the plugin:
site.com/page1 -> site.com/page2
page1 has already been deleted by the plugin.
I created a new post, with the same title (a page was created with the end page1, but page2 still exists)
I will use the plugin to delete and redirect (I will keep the newest one).
creates a duplicate redirect bug because it will create the following redirect
site.com/page2 -> site.com/page1
the plugin should check if there is already a redirection of the links.