# InvalidChild (/docs/errors/chain/InvalidChild)

The children or parents list includes the pivot hotkey itself (a self-loop), including during a hotkey swap when the new hotkey is already a child or parent of the old one. Check the `children` argument and `ChildKeys`/`ParentKeys` for the hotkeys involved.

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 InvalidChild`.