named bind server – adding multiple TXT records for the same domain

_acme-challenge IN      TXT "JoM6ibdd4vWEwiYNj4XRSftAL1XD1w5WNrHFiRs_Hn-U"
_acme-challenge IN      TXT "6EmvVKhLSn40QKDtGFZXyVPYnSIe1OiD1TSyYkE_yd8g"