# ProportionOverflow (/docs/errors/chain/ProportionOverflow)

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`](/docs/errors/invalid-argument).

## Remediation [#remediation]

Check the argument values against the operation schema

The same explanation is available in the terminal: `btcli explain ProportionOverflow`.