Twig template error in contact detail page in admin panel

[mizmiz]

Error message Key "BIRTHDAY" for array with keys "FNAME, LNAME, ADDRESS, PHONE" does not exist.

File vendor/lukeyouell/craft-mailchimplists/src/templates/list/member.twig line 59

I think it should be <p>{{ (response.body.merge_fields.BIRTHDAY is not defined) ? 'Undefined' }}</p>