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 ('f31e38a9cde004f7c9b44e6b37007398', -1, 1728647523, 1728647523, '2cdcfbec', 10, 0, 0)

Line : 187
File : sessions.php