I received a Conformance/Syntax error indicating H01 - CLIENT NOT VALID FOR OVERLAND DESTINATION in ACI Ocean. What does this mean?

I received a Conformance/Syntax error indicating H01 - CLIENT NOT VALID FOR OVERLAND DESTINATION in ACI Ocean. What does this mean?

This indicates that the carrier selected on this transmission is not authorized to move goods in-bond to an overland destination.

In this scenario, the First Port of Arrival must match the Manifest Destination Office port.