Erro na atividade Faça como eu fiz: inserir informações nas tabelas | Modelagem de banco de dados relacional: entendendo SQL

Ao tentar executar o comando abaixo, apareceu o seguinte erro "0 26 18:38:01 INSERT INTO VENDAS VALUES (1, 3, 7, 1, '2020-11-02'), (2, 4, 8, 2, '2020-11-02'), (3, 4, 4, 3, '2020-11-02'), (4, 1, 7, 1, '2020-11-03'), (5, 1, 6, 3, '2020-11-03'), (6, 1, 9, 2, '2020-11-04'), (7, 4, 1, 3, '2020-11-04'), (8, 1, 5, 2, '2020-11-05'), (9, 1, 2, 1, '2020-11-05'), (10, 3, 8, 2, '2020-11-11'), (11, 1, 1, 4, '2020-11-11'), (12, 2, 10, 10, '2020-11-11'), (13, 1, 12, 5, '2020-11-18'), (14, 2, 4, 1, '2020-11-25'), (15, 3, 13, 2,'2021-01-05'), (16, 4, 13, 1, '2021-01-05'), (17, 4, 4, 3, '2021-01-06'), (18, 2, 12, 2, '2021-01-06') Error Code: 1062. Duplicate entry '4-4' for key 'vendas.PRIMARY' 0.000 sec"