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 ('731700097b328163752a79f5062079af', -1, 1737641944, 1737641944, '0390641f', -9, 0, 0)

Line : 187
File : sessions.php