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', 'qpiitj18em4igflo7hh7ub83u7', '54.198.55.167', '1540015126', '1540015126', '/catalog/checkout_confirmation.php?osCsid=6sj9glss8e52koh3b3rll6i7t7')

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