What it is
More than one rel=canonical on a page is a contradiction, and Google may ignore all of them. This usually happens when a theme and a plugin both inject a canonical. More than one rel=canonical on a page. Google may ignore all of them and choose its own.
Why does multiple conflicting canonicals matter for AI search?
Google may ignore all of them and choose its own.
How do you fix it?
Emit exactly one canonical.
How do you find it on your site?
- View source and count the rel=canonical tags.
- Note the target of each.
- Identify which system is injecting each tag.
- Leave exactly one canonical with the intended target.
Which ranking and citation factors does it touch?
Conflicting canonicals can be disregarded entirely, leaving Google to choose, which defeats the point of declaring one.
What is the impact?
Medium-high. Direct.
What is the evidence?
Specify a single canonical; multiples are ignored. Google Search Central, Consolidate duplicate URLs (canonicalization)
Sources
Frequently asked questions about multiple conflicting canonicals
What does "Multiple conflicting canonicals" mean?
More than one rel=canonical on a page.
How do you fix multiple conflicting canonicals?
Emit exactly one canonical.