DR Auto-Sync: not able to config 'wait-store-timeout' and 'wait-sync-timeout'

[tshqin]

these timeout configuration items are not configurable.

» config set replication-mode dr-auto-sync wait-store-timeout 2m0s
» config set replication-mode dr-auto-sync wait-sync-timeout 2m0s

pls notice there's no Success! respond, and we can see there's no update when I check the current configuration.

config show all
...
  "replication-mode": {
    "replication-mode": "dr-auto-sync",
    "dr-auto-sync": {
      "label-key": "dc",
      "primary": "dc1",
      "dr": "dc2",
      "primary-replicas": 2,
      "dr-replicas": 1,
      "wait-store-timeout": "1m0s",
      "wait-sync-timeout": "1m0s",
      "wait-async-timeout": "2m0s"
    }
  }

version:

./pd-server -V
Release Version: v5.4.0
Edition: Community
Git Commit Hash: e3807695b6fc524f9cb84402937e56e733cabd64
Git Branch: heads/refs/tags/v5.4.0
UTC Build Time:  2022-01-17 02:56:38