Problem: they migrated from Drupal to their own engine and opened up a whole series of jambs. One of them does not work out. On one of the pages was a comment module. Each comment received its own unique url and, in fact, contained a duplicate main page. Total, it turned out to accumulate the following doubles:
How in one fell swoop are all pages with
pagetitle%26 ending in this
pagetitle%26 ... redirecting (301) to the only url that works today?