Need to Manually Change Schedule Ship Date,

We have a scenario where one location wants to manually change the schedule ship date. We updated the order date type to Ship and we are still receiving the error "The order date type is "Arrival." Schedule Ship Date can't be manually changed. Schedule ship date can be recalculated if you change the request date or schedule arrival date."

the date automically changes after you update the schedule arrival date, but the team still wants to manually change the scheduled ship date.

We are on R12.2.11.