ORA-04098：觸發器「triggername」是無效的，失敗再驗證

您好我已經創建了一個觸發器，你可以看到波紋管的下方，但它給了以下錯誤：ORA-04098：觸發器「triggername」是無效的，失敗再驗證

ORA-04098: trigger 'APPS.EMP_delete' is invalid and failed re-validation

我的代碼：

CREATE OR REPLACE TRIGGER emp_delete 
AFTER DELETE 
    ON EMP 
    FOR EACH ROW 

BEGIN 

INSERT INTO history_emp (EMPLOYEE_ID, SALARY, JOB_ID, HIRE_DATE, DEPARTMENT_ID, FIRST_NAME,  last_name, DELETED_BY, DELETION_DATE) 
    VALUES 
    (:OLD.EMPLOYEE_ID, 
    :OLD.SALARY, 
    :OLD.JOB_ID, 
    :OLD.HIRE_DATE, 
    :OLD.DEPARTMENT_ID, 
    :OLD.FIRST_NAME, 
    :OLD.LAST_NAME, 
     USER, 
    SYSDATE); 

    DELETE FROM BACKUP_EMP WHERE EMPLOYEE_ID = :OLD.EMPLOYEE_ID; 

END;

如何修復此錯誤？

來源

2014-07-18 user3851849

創建觸發器時會出現什麼錯誤？或者當你查詢'user_errors'？ –

執行以下操作並將結果粘貼到問題B編輯中。 'SELECT * FROM \t user_errors WHERE type ='TRIGGER'AND name ='EMP_DELETE';' – user75ponic