Issue with schema type "imageArray" causing deployment error.

...
        {
            title: "Other Images",
            name: "imageArray",
            type: "imageArray",
        },
...

export default {
    name: 'imageArray',
    type: 'array',
    title: 'More Images',
    of: [
        {
            type: 'image',
            options: {
                metadata: ['lqip', 'palette']
            },
            fields: [
                {
                    title: 'Caption',
                    name: 'caption',
                    type: 'string',
                    options: {
                        isHighlighted: true
                    }
                },
                {
                    title: 'Alternative text',
                    name: 'alt',
                    type: 'string',
                    options: {
                        isHighlighted: true
                    }
                },
            ]

        },
    ]
}

import createSchema from 'part:@sanity/base/schema-creator'
import schemaTypes from 'all:part:@sanity/base/schema-type'
import siteSettings from './siteSettings'
import product from './product'
import mainImage from './mainImage'
import imageArray from './imageArray'
import review from './review'
import globalVariables from './globalVariables'

export default createSchema({
    name: 'mySchema',
    types: schemaTypes.concat([
        siteSettings,
        product,
        mainImage,
        imageArray,
        review,
        globalVariables
    ])
})

export default {
  name: 'mainImage',
  type: 'image',
  title: 'Image',
  fields: [
    { ... }
  ],
}

    {
      name: 'imagesRef',
      title: 'Images Ref',
      type: 'array',
      of: [ { type: 'mainImage' } ]
    }