Trigger is resulting in ORA-04098 (Trigger invalid)

Question

I'm trying to create a trigger which automatically updates the rpimary key each time a record is inserted in the table CONTACTS_MAN. This table is basically an address book.
SQL> describe contacts_man
Name Null? Type
CONTACT_ID NOT NULL NUMBER
DATEREF DATE
TITLE VARCHAR2(200)
FNAME VARCHAR2(50)
MNAME VARCHAR2(50)
SNAME VARCHAR2(50)
SUFFIX VARCHAR2(5)
COMPANY VARCHAR2(150)
DEPARTMENT VARCHAR2(200)
JOB_TITLE VARCHAR2(150)
BUSINESS_ST1 VARCHAR2(200)
BUSINESS_ST2 VARCHAR2(200)
BUSINESS_ST3 VARCHAR2(200)
BUSINESS_CITY VARCHAR2(200)
BUSINESS_POSTCODE VARCHAR2(20)
BUSINESS_COUNTY VARCHAR2(100)
BUSINESS_COUNTRY VARCHAR2(100)
BUSINESS_REGION VARCHAR2(150)
HOME_ST1 VARCHAR2(150)
HOME_ST2 VARCHAR2(200)
HOME_POSTCODE VARCHAR2(150)
HOME_CITY VARCHAR2(100)
HOME_REGION VARCHAR2(50)
BUSINESS_FAX VARCHAR2(50)
BUSINESS_PHONE VARCHAR2(50)
CAR_PHONE VARCHAR2(20)
COMPANY_MAIN_PHONE VARCHAR2(50)
HOME_PHONE VARCHAR2(50)
MOBILE1 VARCHAR2(50)
MOBILE2 VARCHAR2(50)
ANNIVERSARY DATE
DATE_OF_BIRTH DATE
CHILDREN NUMBER
GENDER VARCHAR2(10)
EMAIL1 VARCHAR2(50)
EMAIL2 VARCHAR2(50)
EMAIL3 VARCHAR2(50)
GOVERNMENT_ID VARCHAR2(500)
HOBBY VARCHAR2(500)
KEYWORDS VARCHAR2(500)
LANGUAGES VARCHAR2(500)
NOTES VARCHAR2(2500)
REFERRED_BY VARCHAR2(150)
SPOUSE VARCHAR2(100)
WEBPAGE VARCHAR2(150)
BUSINESS_PHONE2 VARCHAR2(100)
CATEGORY NUMBER
1) First I create the following sequence:
CREATE SEQUENCE mancontacts_seq
START WITH 10
INCREMENT BY 1;
2) Then create the following trigger:
CREATE OR REPLACE TRIGGER contactman_autokey
BEFORE INSERT ON CONTACTS_MAN
FOR EACH ROW
BEGIN
:NEW.contact_id := mancontacts_seq.NEXTVAL;
END;
WHEN TRYING TO INSERT I GET THE FOLLOWING ERROR:
SQL> INSERT INTO CONTACTS_MAN (FNAME, SNAME)
2 VALUES ('MyFirstName', 'MySurname');
INSERT INTO CONTACTS_MAN (FNAME, SNAME)
ERROR at line 1:
ORA-04098: trigger 'SYS.CONTACTMAN_AUTOKEY' is invalid and failed re-validation
Any suggestions are greatly appreciated.
Thank you!!
Edited by: user9367338 on May 2, 2011 10:10 AM
Edited by: user9367338 on May 2, 2011 10:12 AM

Answer 1

Thanks for a prompt response. I am on 11g. I dropped the SYS trigger. Connected to the same user but not as DBA.
Re-created sequence and triggers ensuring USER_SCHEMA.trigger and USER_SCHEMA.sequence.
Managed to insert records with no errors now. Didn't quite catch the last comment about 11g since I'm able to create sequences outside the SYS schema (ie: as a normal user). Is this is ok or am I still missing something? Thanks