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Incompatible combination of params and filter

The reference field allows you to define options for the input component, namely a GROQ filter and a set of parameters for this filter. You can either define the filter statically, OR you can use a function in order to derive the filter based on the surrounding document.

If you are encountering this error, it usually means that you've defined a function for deriving the filter, but has also defined a set of static parameters. The solution is to either use static values, or just use the filter function and return an object containing both the filter and the parameters:

export default {
  name: 'blogPost',
  type: 'document',
  fields: [
    // ... your other schema fields ...
    {
      name: 'author',
      type: 'reference',
      to: [{type: 'person'}],
      options: {
        filter: () => {
          return {
            filter: 'age > $age',
            params: {age: 30}
          }
        }
      }
    }
  ]
}

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