Canonical URL has no incoming internal links

[Metaphysicaluk]

Hi everyone,

Having trouble with canonical urls, it looks like most of my product pages have over 5 canonical links which doesn't seem right? 

Most of the canonical urls have something like this at the end. ?_pos=1&_fid=2415e8235&_ss=c

A site audit on ahrefs shows I've issues with cannonical url has no incoming links 749 of them and 2857 links to no-canonical versions. Feeling like I've enough links to open a chain shop... 

I've been trying to wrap my head around this for a while so any help will be greatly appreciated