If you’re reading this, you probably saw this github issue
https://github.com/LekoArts/gatsby-starter-prismic/issues/19
and running
gatsby cleandid not solve your issue.
I’m using Contentful as my headless CMS and I was able to fix this by removing one of the references in the content model.
I have two content models, let’s name it Model A and Model B.
Model A has a one-to-many relationship with Model B.
Unfortunately, Model B has no idea that it has any relationship with Model A so you have to add another property and connect it to Model A. This is one of the limitation of Contentful . So
Model B has a one-to-one relationship with Model A.
Here’s a quote from one of their forums
The workaround for two-way links is- create reference fields in both entries. So both entries will become parent and child for each other.
That’s sort of many-to-many as mentioned.
This is all good when you’re NOT using Gatsby.js!
So to actually fix this, I just have to remove the property in Model B because the contentful plugin will take care of the reverse reference for you. That’s neat.
Well this was actually written in their README file :(
When using reference fields, be aware that this source plugin will automatically create the reverse reference. You do not need to create references on both content types