We hypothetically consider this text Minaic because the inscription al-Kāfir 3, more or less contemporary (cf. the palaeography and the dedication to Mtbnṭyn), is Minaic. Robin suggests that the text could have a penitential content.
Robin: "la seconde ligne suggère qu'une action a été entreprise sans l'accord de la divinité. Ce texte pourrait être, de ce fait, de nature pénitentielle". In fact, the unique attestation of blty in Minaic is in the penitential text YM 10886. In the Minaic corpus there is no comparison for the alternative solution "[q]blty", proposed by Robin.
Robin, Christian J. 1992. Inabbaʾ, Haram, al-Kāfir, Kamna et al-Ḥarāshif. Fasc. A: Les documents. Fasc. B: Les planches. Inventaire des inscriptions sudarabiques. 1. Paris: de Boccard / Rome: Herder. [Académie des Inscriptions et Belles-lettres; Istituto italiano per l'Africa e l'Oriente]
Rossi 2022: 293-294, 484, fig. 55
Rossi, Irene 2022. The city-states of the Jawf at the dawn of Ancient South Arabian history (8th-6th centuries BCE). II. Corpus of the inscriptions. (Arabia Antica, 17/2). Roma: «L'Erma» di Bretschneider.