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) VALUES ('9d6d06c7cb7ab78037b2865442965fe1', -1, 1524405182, 1524405182, '365147bb', 1, 0)

Line : 158
File : sessions.php