I'cant undertand why backbone params weight decay setting is 0

[brotherhoon-code]

I'm testing the performance of a custom model.
I set the weight decay of the optimizer as below in the config.

optim_wrapper = dict(
    optimizer=dict(
        type='AdamW',
        lr= 0.001,
        weight_decay=0.05,
        eps=1e-8,
        betas=(0.9, 0.999)),
    paramwise_cfg=dict(
        norm_decay_mult=0.0,
        bias_decay_mult=0.0,
        flat_decay_mult=0.0,
        custom_keys={
            '.absolute_pos_embed': dict(decay_mult=0.0),
            '.relative_position_bias_table': dict(decay_mult=0.0)
        }),
    clip_grad=dict(max_norm=5.0),
)

However, I get INFO like the one shown below.
Did I write the config file incorrectly?

[brotherhoon-code]

https://mmpretrain.readthedocs.io/en/latest/advanced_guides/schedule.html

I found this docs
thank you