Errors/Chain errors
TooManyRegistrationsThisInterval
Wait for the rate-limit window to pass, then retry
Registrations in the current interval reached the cap of three times TargetRegistrationsPerInterval for the subnet. Compare RegistrationsThisInterval against that hyperparameter and wait for the next interval to start.
Declared by the SubtensorModule pallet; it classifies to the semantic code rate_limited.
Remediation
Wait for the rate-limit window to pass, then retry
The same explanation is available in the terminal: btcli explain TooManyRegistrationsThisInterval.