phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('b2553202c1ad1b228b787552e9be8cba', -1, 1544934290, 1544934290, '22e41e45', 106, 0, 0)

Line : 172
File : sessions.php