WARNING: option --ssl-verify-server-cert is disabled, because of an insecure passwordless login.
--------------
ALTER TABLE restock_list
    MODIFY product_id INT UNSIGNED NULL,
    ADD COLUMN free_description VARCHAR(255) NULL AFTER product_id,
    ADD COLUMN customer_reference VARCHAR(255) NULL AFTER free_description
--------------

ERROR 1060 (42S21) at line 10: Duplicate column name 'free_description'