ColdKeyAlreadyAssociated

The object or state already exists; treat the goal as met or pick a different target

The destination coldkey of a coldkey swap already has staking hotkeys associated with it, so it cannot receive the swapped identity. Check the StakingHotkeys storage for the new coldkey and swap to a fresh, unused coldkey instead.

Declared by the SubtensorModule pallet; it classifies to the semantic code already_exists.

Remediation

The object or state already exists; treat the goal as met or pick a different target

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