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 ('5c4ebb0f5c9812ec8d072e290c088d4b', -1, 1767578871, 1767578871, 'd849d89c', 0, 0, 0)

Line : 193
File : sessions.php