Error: Call to undefined method Drupal\Core\Field\BaseFieldDefinition::createDuplicate()

Ranjit1032002 → closed merge request !1

It appears that this happens with content_moderation module enabled, on the moderation_state field.

For now I circumvented this issue like this:

    // Clone the field.
    $original_field = $data['field'];
    if (method_exists($original_field, 'createDuplicate')) {
      // Do stuff.
    }

I had the same issue with module "Content Moderation" enabled and this fix works for me.
Needs to contrib the patch files.

I applied this MR and it worked fine for me. I didn't dig into any side effects this may have on Content Moderation. It does report that a field could not be cloned because the createDuplicate method does not exist. I suspect it isn't really an issue though.