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', '5eic5egleosq03i6kvki2b3ka6', '54.156.51.193', '1537570877', '1537570877', '/catalog/default.php?cPath=56_168&osCsid=tpd1n7je2ugue4v4h3tr34thp6')

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