rank.json reset every time

{
  "default_ranks": {
    "player": "player",
    "op": "op"
  },
  "ranks": {
    "player": {
      "parent": "builtin_player",
      "permissions": [],
      "config": {
        "ftbu.chunkloader.max_chunks": 300,
        "ftbu.homes.max": 100,
        "ftbu.claims.max_chunks": 350,
      }
    },
    "op": {
      "parent": "builtin_op",
      "syntax": "<&2$name&r> ",
      "permissions": [],
      "config": {
        "ftbu.chunkloader.max_chunks": 1000,
        "ftbu.homes.max": 100,
        "ftbu.claims.max_chunks": 1500,
      }
    }
  }
}