Errors/Chain errors
TooManyReserves
A chain-side capacity limit was hit; reduce the size or count of the request
The account already has the maximum number of named reserves. Check the account's Reserves entry against the MaxReserves constant; a named reserve must be unreserved before adding another.
Declared by the Balances 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 TooManyReserves.