RRC 279 and 276 are likely struck by the brothers of cos. 120 who killed himself in 119 when convicted because of his actions on the land commission. Given how the dating of these two issues is approximate 122-119 ish AND the drama around their brother it seems worth some further thought.
See:
Beness, J. Lea. “Carbo’s tribunate of 129 and the associated dicta Scipionis.” Phoenix 63, no. 1-2 (2009): 60-72.
Liv Mariah Yarrow 