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', 'mk866iht3rldbq01opq24ebvv0', '54.92.163.105', '1539648605', '1539648605', '/catalog/default.php?cPath=50_133&osCsid=ta8g7288cv9du0p8gstkoqg7n1')

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