Eroor in the system basic query

Toad for Oracle
1

ORA-00955: name is already used by an existing object

WHY DO THIS ERROR HAPPENS? THE TABLE NAME IS UNIQUE IN THIS DATABASE. HELP ME IF SOMEBODY CAN. THE QUERY IS AS FOLLOWS:

CREATE TABLE "COMPANY_EMPLOYEES"
(EMP_ID NUMBER(4),
EMP_NAME VARCHAR2(25),
HIREDATE DATE,
END_DATE DATE,
SAL NUMBER(10));

2

There is another object in your schema by that name. It might not be a table.

try this:

Select * from user_objects where object_name = 'COMPANY_EMPLOYEES';