During import of a Customers V3 entity appears this error. Google search did not bring results.
After invenstigation I have found out, that during mapping one of fields is disabled by a configuration key. When opening mapping a following message appears:
One or more configuration keys are disabled in the data entity , 'Customers V3'. A field is available to be used in data management if the configuration key of the field, its table and its data entity are all enabled
Another message shows additional information:
Field 'ISFUELSURCHARGEAPPLIED' will not be available for use in data management. The configuration key 'ShipCarrier' is disabled
After deleting a field from mapping export succeeded.