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 ('37f428a3aa73fbcec2d1e25631759ca6', -1, 1709229864, 1709229864, '03ef4c19', -10, 0, 0)

Line : 187
File : sessions.php