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 ('781f18f62d57938ff0155b4822700382', -1, 1737483387, 1737483387, '12df9ec1', 6, 0, 0)

Line : 187
File : sessions.php