Localized Block with localized fields unable to save values across multiple locales

[tiago-meireles]

Link to reproduction

No response

Payload Version

beta.87

Node Version

20 LTS

Next.js Version

15.0.0-canary.104

Describe the Bug

It's not possible to autosave/publish content across multiple locales if we are using a localized field within an array field.

For example, I'm currently using the beta demo project (with multiple locales) and I have created a localized Block with one array field that also contains one localized text field (field1).

The first time I configure this content for any locale, I have no issues. If I then try to configure the same Block in another locale, I keep having this error:

ERROR: There was an error while saving a version for the Page with ID 1.
ERROR: Cannot read properties of undefined (reading '_pages_v_blocks_array_block_list_locales_locale_parent_id_uniqu')

This causes the autosave and publishing actions to no work and the value in the localized field is not stored in the database.

I have only encountered this issue for localized fields inside the array field.

This is the field I added to the Pages collection fields

    {
      name: 'content',
      label: 'Content',
      type: 'blocks',
      localized: true,
      blocks: [ArrayBlock],
    }

And this is the ArrayBlock that I'm using for testing

export const ArrayBlock: Block = {
  slug: 'arrayBlock',
  interfaceName: 'ArrayBlock',
  fields: [
    {
      type: 'array',
      name: 'List',
      label: 'List',
      fields: [
        {
            type: 'group',
            name: 'Element',
            fields: [
              {
                name: 'field1',
                type: 'text',
                label: 'Field1',
                localized: true,
                required: true,
              },
            ],
          },
      ],
    },
  ],
}

This is the behaviour I'm experiencing

https://github.com/user-attachments/assets/2c346475-ef30-445d-aef3-4ac4c8df68d0

Reproduction Steps

• Use the beta demo project
• Update to version 87
• Create the ArrayBlock Block and add this to the Pages collection (as described above)
• Run the necessary migrations
• Follow the same steps as the ones in the video
• Any autosave/publishing action triggers the _pages_v_blocks_array_block_list_locales_locale_parent_id_uniqu constraint

Adapters and Plugins

db-postgres