Oracle Error Message
ORA-39252: Importing a SecureFile LOB with metadata or archived SecureFile LOB into a BasicFile LOB is not allowed
Reason for the Error
An attempt was made to import a SecureFile LOB that contained metadata or was archived at the time of export into a BasicFile LOB.
Solution
Perform the import into a different table, perform DBMS_LOB.ARCHIVE_GET on any archived SecureFile LOBs, and then use INSERT AS SELECT to migrate the SecureFile LOB data to the BasicFile LOB.