Oracle EXPDP报错如下：

ORA-31626: job does not exist
ORA-31637: cannot create job SYS_EXPORT_SCHEMA_05 for user SYS
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 95
ORA-06512: at "SYS.KUPV$FT_INT", line 798
ORA-39244: Event to disable dropping null bit image header during relational select
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 86
ORA-06512: at "SYS.KUPC$QUE_INT", line 1840
ORA-24001: cannot create QUEUE_TABLE, SYS.KUPC$DATAPUMP_QUETAB_1 already exists
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想drop却报错对象不存在：

exec dbms_aqadm.drop_queue_table(queue_table =>'SYS.KUPC$DATAPUMP_QUETAB_1', force=> TRUE);
exec dbms_aqadm.drop_queue_table(queue_table =>'SYS.KUPC$DATAPUMP_QUETAB_2', force=> TRUE);
exec dbms_aqadm.drop_queue_table(queue_table =>'SYS.KUPC$DATAPUMP_QUETAB',force=> TRUE);
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请问这个问题该如何处理？