Errors/Chain errors
InvalidSubnetNumber
Check the argument values against the operation schema
A root-claim call passed an empty subnet set or more subnets than the per-call maximum (claim_root, or KeepSubnets in set_root_claim_type). Check the subnets argument is non-empty and within the MAX_SUBNET_CLAIMS limit.
Declared by the SubtensorModule 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 InvalidSubnetNumber.