1366 - Incorrect integer value: '' for column 'customer_id' at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', 'li40j9l36jqrt8l2m1jnknl1g2', '54.161.100.24', '1540008248', '1540008248', '/catalog/shopping_cart.php?osCsid=jfumef7n3mie0bcc1700v0poe0')

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