1.) Check the orphaned datapump jobs.
SQL>select owner_name,job_name,operation,job_mode,state,attached_sessions from dba_datapump_jobs;
4.) Check for existing data pump jobs
Now check the existing datapump job by query issued in step 1. If objects are in recyclebin then purge the objects from the recyclebin.
SQL> purge table system.SYS_EXPORT_SCHEMA_02;