ORA 00955 name is already used by an existing object

Hibernate: 
    create table SOME_JOIN_TABLE (
        LEFT_ITEM_id number(19,0) not null,
       

RIGHT_ITEM_id number(19,0) not null,
primary key (LEFT_ITEM_id, RIGHT_ITEM_id)
)
ERROR SchemaExport - HHH000389: Unsuccessful: create table SOME_JOIN_TABLE (LEFT_ITEM_id number(19,0) not null, RIGHT_ITEM_id number(19,0) not null, primary key (LEFT_ITEM_id, RIGHT_ITEM_id))
ERROR SchemaExport - ORA-00955: name is already used by an existing object