Errors/Chain errors
TooManyTopics
A chain-side capacity limit was hit; reduce the size or count of the request
The number of topics passed to seal_deposit_event exceeds the schedule's event_topics limit. Reduce the number of indexed topics in the contract's event definition or compare against the schedule limit.
Declared by the Contracts 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 TooManyTopics.