What does the layer_id refer to in the details df ?

[L4RBI]

Good day to you,
while trying to implement my own per-layer learning rate scheduler, based on the layer's alpha value.
in the process of implementing that, the layer_id does not match the index of the layer.
is there any way to know which layer is described by each row of the details dataframe ?
thank you in advance for your time!
I am available to provide you with further context if needed.