Error in materialized views

Question

during the materialized view creation.
i am phasing the following error
ERROR at line 12:
ORA-12014: table 'mtest' does not contain a primary key constraint
but the table does't have primary key.
when i tried to add primary key to the table mtest .another problem is comming
sql> alter table mtester.mtest add primary key (IUWP2_ITEM_NO);
alter table mtest add primary key (IUWP2_ITEM_NO)
ERROR at line 1:
ORA-02437: cannot validate (mtester.SYS_C0062425) - primary key violated

Answer 1

U can use this script.
alter table EMPLOYEE add constraint foo11 primary key (DEPRATMENT_ID) deferrable novalidate;