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', 'e8eik5sohp8h5tnb9n07b8rfr6', '54.166.130.157', '1540317471', '1540317471', '/catalog/login.php?osCsid=6l2jqgh7cua9vn4kkqsphc6mb1')

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