NegativeSigmoidSteepness

A non-root caller (subnet owner) passed a negative value to sudo_set_alpha_sigmoid_steepness; negative steepness values are reserved for the root origin. Use a non-negative steepness or submit the call as root.

Declared by the AdminUtils pallet; it classifies to the semantic code invalid_argument.

Remediation

Check the argument values against the operation schema

The same explanation is available in the terminal: btcli explain NegativeSigmoidSteepness.