Do we have an API to update the OBLPN Type and Custom Field? Even if the OBLPN is in Loaded status.

We have a requirement to update the OBLPN Type and Custom Field, after the picking is done.

The system might suggest an OBLPN Type, but due to ground scenarios like unavailability or better box availability, the picker picks on a different type of Box, which in the system is a different OBLPN Type. Do we have an API to update the OBLPN Type and Custom Fields, so that we can maintain correct data in system. Also, sometimes it gets loaded too, can we also update the OBLPN Type and Custom Fields even in Loaded status using API?