Canonical URL

Hi!

I have a doubt:

100% of my posts have the message:

Canonical URL
A canonical URL is required by search engines to handle duplicate content.

I believe that no page has any canonical URL. The message is for all my posts, 100%.

I don’t believe everyone is a copy.

How do I solve it? Am I doing something wrong?

Is there anything I can improve on to remove this note?

Finally, all my posts get orange score, and I can’t complete the SEO score.

Thanks.

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