SAP Message 56240 - Trip schema &1 has number assignment(NV) &2, trip schema &3 has NV &4

Diagnosis
The trip schema that you have chosen has a different number assignment('I'nternal or 'E'xternal) than the current trip schema.

System Response
Please choose a trip schema with the same number assignment. If theappropriate trip schema is not available, please contact your systemadministrator.