Errors/Chain errors
TooManyUIDsPerMechanism
A chain-side capacity limit was hit; reduce the size or count of the request
Setting max UIDs or mechanism count would make max_uids times mechanism_count exceed the chain default of 256 UIDs per subnet. Check MaxAllowedUids and the subnet's mechanism count so their product stays within the limit.
Declared by the SubtensorModule pallet; it classifies to the semantic code limit_exceeded.
Remediation
A chain-side capacity limit was hit; reduce the size or count of the request
The same explanation is available in the terminal: btcli explain TooManyUIDsPerMechanism.