ORA-24005: Inappropriate utilities used to perform DDL on AQ table

CREATE TABLE OBDQ_ADM.AQ$_OBDQ_FAST_TAB_L
(
  MSGID           RAW(16),
  SUBSCRIBER#     NUMBER,
  NAME            VARCHAR2(30 BYTE),
  ADDRESS#        NUMBER,
  DEQUEUE_TIME    TIMESTAMP(6) WITH TIME ZONE,
  TRANSACTION_ID  VARCHAR2(30 BYTE),
  DEQUEUE_USER    VARCHAR2(30 BYTE),
  FLAGS           RAW(1)
)

SQL> ALTER TABLE OBDQ_ADM.AQ$_OBDQ_FAST_TAB_L MODIFY NAME VARCHAR2(30 CHAR);
*
ERROR at line 1:
ORA-24005: Inappropriate utilities used to perform DDL on AQ table OBDQ_ADM.AQ$_OBDQ_FAST_TAB_L

How do I resolve this error!

Regards!

Hine