I have some page errors being identified by GSC as "Alternate page with proper canonical tag". The referring url's typically have a query string parameter (that my pages don't have), or a typo in the url. They all come from other domains that I don't control. The few referring pages I've checked, don't seem to be malicious, just incorrect urls.
The real url's all show up fine, and Google identifies the canonical as "Same as user-declared canonical". Since I don't really have control over the referrer and the actual page is in the Google index, do I really need to be concerned about these errors? If they're coming from other referring websites, why is Google flagging them as an error on my site?