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 ('9470b58e1f0434dfc7ab6fd879bb3484', -1, 1529925750, 1529925750, '3651c518', 1, 0)

Line : 158
File : sessions.php