MySQL error in file: /engine/forum/sources/components/functions.php at line 83

Error Number: 1366

The Error returned was:
Incorrect integer value: '' for column 'member_id' at row 1

SQL query:

INSERT INTO dle_forum_sessions (id, member_name, member_id, user_group, ip, browser, running_time, location, act_forum, act_topic) VALUES ('vu79svfcm75u8be4tt5bbv60e4', '', '', '5', '54.198.200.157', 'CCBot/2.0 (http://commoncrawl.org/faq/)', '1498664390', 'forum', '56', '0')