phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('e6158845ef9e6330f373db1543251c2f', -1, 1730803593, 1730803593, '2cc0430a', 17, 0, 0)

Line : 195
File : sessions.php