Errors/Chain errors
ProportionOverflow
Check the argument values against the operation schema
The child proportions passed to set_children sum to more than u64::MAX. Reduce the per-child proportion values so their total fits in a u64; each proportion is a fraction of u64::MAX.
Declared by the SubtensorModule pallet; it classifies to the semantic code invalid_argument.
Remediation
Check the argument values against the operation schema
The same explanation is available in the terminal: btcli explain ProportionOverflow.