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', '5v0o38s1hhgalrg46lsiqerph6', '54.81.150.27', '1537291566', '1537291566', '/catalog/privacy.php?osCsid=pgrm7rcj34qh43e2gv3pc5bhe2')

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