Extending PO delivery window

Carrier is attempting to set up delivery but shes getting an error message

Essentially we need to update the PO's delivery window.

Be advised that Purchase Order (PO) 3VBAOBTM is currently presenting the following issue: expired delivery window. To enable the scheduling of a new appointment via Carrier Central, the PO's delivery window must be in an active state, which necessitates its extension or regeneration.

CARP advised me to do this through SS but they've previously sent me to CARP team, any ideas?