Relation custom field is broken on V2 (Related Products)

[nonlinearcom]

Relation custom field seems to be broken on V2. After adding related products the update button remains disabled.

customFields: {
Product: [
    {
    name: 'relatedProducts',
    label: [{ languageCode: LanguageCode.en, value: "Related Products" }],
    type: 'relation',
    entity: Product,
    list: true,
    ui: { component: 'product-multi-form-input', selectionMode: 'product' }
     },
  ],
}

Then, if we edit any other field and try to update we get this error:

Variable "$input" got invalid value null at "input.customFields.relatedProductsIds[0]"; Expected non-nullable type "ID!" not to be null.

• @vendure/core 2.0.2
• Nodejs version 18.16
• Database postgres

related to #2178