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', 'lmqne0s6t8rumf0r2vnvv3vjr1', '54.162.239.233', '1537404238', '1537404238', '/catalog/default.php?cPath=29&osCsid=ei1vtai1lbl8l1h2r4gcjes9r3')

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