After iterating through the nodes, the value has changed.

[Hello1M]

field-division:
  carcontrol&system:
    skillId:
      - "2023080400000047"
      - "2023071900000110"
      - "2024103000000020"
      - "2023102400000010"
      - "2023082900000022"
      - "2023100700000021"
      - "2024051600000028"
      - "2024031100000012"
      - "2024071600000049"
      - "2024062500000017"
      - "2024120500000028"
      - "2025030500000045"
      - "2024072500000090"
  navigation:
    skillId:
     - "2023080400000034"
     - "2023072600000044"
     - "2023100700000019"
     - "2024051400000007"

YAML::Node fieldDivision = m_adapterFiledCfg["field-division"];
for (YAML::const_iterator it = fieldDivision.begin(); it != fieldDivision.end(); ++it) {
    const YAML::Node& field = it->first;
    std::cout << it->first.as<std::string>() << std::endl;
    const YAML::Node& requirement = it->second;
    for (auto& node1 : requirement) 
    {
        std::cout << node1.first.Type() << std::endl;
    }
    std::cout << field.as<std::string>() << std::endl;
}

output:

carcontrol&system
2
skillId
navigation
2
skillId

The value of it->first is correct, but the value of field is skillId. I don't see any issue, but I'm not sure what caused it. Can someone provide an explanation?