# ChildParentInconsistency (/docs/errors/chain/ChildParentInconsistency)

A `set_children` or parent-delegation call would make the same hotkey appear as both a child and a parent, or referenced a child missing from the proposed mapping. Inspect the `ChildKeys` and `ParentKeys` storage for the hotkeys involved and remove the overlap.

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 ChildParentInconsistency`.