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', 'dcp539tif0go3bajsvfth5re25', '54.198.52.82', '1537843604', '1537843604', '/catalog/default.php?cPath=46&osCsid=jrmf80e8f8tn7p6e8i5tot18o5')

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