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', 's958dmb4femr8u43shr8etb3s5', '54.80.83.123', '1537836545', '1537836545', '/catalog/shopping_cart.php?osCsid=5se2egr72u4te07inka8lol8u5')

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