Sutton has a contract until the end of the 24/25 season.
That mean much though? If Sutton barely plays for the Nix this season, and the billionaire owner offers the millionaire owners very favourable loan deal terms, I'm sure Welnix would consider heavily letting Sutton go up to his hometown. Or just the old ALM favourite 'contract termination by mutual agreement'
Though as above there seems a few other currently available Kiwi LB options (Deklan Wynne, Francis De Vries, Adam Supyk etc)