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 ('99abeca2b2587add21728e05ca73e7e8', -1, 1730416465, 1730416465, '12e19cec', -1, 0, 0)

Line : 195
File : sessions.php