Errors/Chain errors
SubnetDoesNotExist
Use an existing netuid; `btcli subnets list` shows valid ones
The admin-utils call targets a netuid with no registered subnet. Verify the netuid argument against NetworksAdded (the set of existing subnets) before setting hyperparameters.
Declared by the AdminUtils pallet; it classifies to the semantic code subnet_not_exists.
Remediation
Use an existing netuid; btcli subnets list shows valid ones
The same explanation is available in the terminal: btcli explain SubnetDoesNotExist.