AlreadyApproved

The sender has already approved this multisig call, so a repeat approval is redundant. Check the Multisigs entry for the call hash: the sender's account already appears in its approvals list.

Declared by the Multisig 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 AlreadyApproved.