some days ago I changed the slugs of several pages. Now, those pages can be reached from both slugs/URLs. Shouldn’t the “old slug” generate a 404 error?
Webmaster Tools report Dublicate title tags and Meta Descriptions, because the old and new slugs lead to the same page. Any ideas why both slugs are still working?
But is there a reason why the old slug still exits?
So renaming is not a “rename” but a “dublicate using a different slug”? That would mean that all current and recent slugs still exist and all old slugs have to be redirected to the current slug?