Oracle Message ORA-22371 - Table contains data of type string.string, version string, which does not exist

ERRORTable contains data of type string.string, version string, which does not exist
CAUSESome of the older versions of the type may have got deleted because one or more of the types it were referencing was dropped.
ACTIONThese data could not be read as the whole ADT. Read the data at individual scalar attribute level.