Errors/Chain errors
HotKeySetTxRateLimitExceeded
Wait for the rate-limit window to pass, then retry
The coldkey attempted a hotkey set/swap before TxRateLimit blocks had passed since its last such transaction. Check the coldkey's last transaction block against the TxRateLimit storage value and wait the remaining blocks.
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 HotKeySetTxRateLimitExceeded.