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 ('2db4a7a29e4ad8e54ba5f98f9bcaed39', -1, 1544934335, 1544934335, '0350da35', 75, 0, 0)

Line : 172
File : sessions.php