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', '5k39lemb067b8t1qd58ks7igb0', '54.145.83.79', '1539748742', '1539748742', '/catalog/default.php?cPath=53&osCsid=4iuvmru6cgiufe33qdr01vgre1')

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