I received rejection 'Conveyance Trailer Related CCN Port code on manifest must equal port on conveyance'. What does it mean?

I received rejection 'Conveyance Trailer Related CCN Port code on manifest must equal port on conveyance'. What does it mean?

Reason:
Either the Trip or Cargo has an incorrect port of entry. It should be the same.






Resolution:
1. Check both the Create Trip and Add cargos tab.
2. Change the field that has an incorrect port. 
3. Make sure you hit the 'Update and Continue' button in the Create Trip tab. While in the Add Cargos tab, click the three dots under the Action column and click Edit. Then update the port accordingly, scroll down to choose the proper Send As function, and save it by hitting .
4. Scenario:
If Trip is AC, Cargo is RJ = Send Trip as Modify | Send Cargo as Add
If Trip is RJ, Cargo is AC = Send Trip as Add | Send Cargo as Modify
If both are in RJ status = Send both as Add
If it came back as RJ status (invalid status of request) = Send both as Modify