Errors/Chain errors
StakingRateLimitExceeded
Wait for the rate-limit window to pass, then retry
Staking operations (add_stake, remove_stake, and similar) were submitted faster than the per-block staking rate limit allows for the hotkey-coldkey pair. Space the transactions out and retry in a later block.
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 StakingRateLimitExceeded.