How to override parent config with config in child directory?

[Kami-chanw]

My directory is as follows:

config
├── setting.yaml
└── peft
     └──  lora.yaml

My content in setting.yaml:

defaults:
   - _self_
   -  peft: lora
trainer:
   loss_weight: 0.5

My content in lora.yaml

trainer:
   loss_weight: 0.1

How to override loss_weight in setting.yaml when I load lora.yaml?