So we have

C_MythicPlus.GetCurrentAffixes()

[1]={
  [1]={
    id=9,
    seasonID=0
  },
  [2]={
    id=6,
    seasonID=0
  },
  [3]={
    id=3,
    seasonID=0
  }
}

If i don't set

SEASON_AFFIX = affixes[4].id
to a fixed value, it errors out.
The code needs to be a bit more robust here.