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 ('f139afab731872bc9623c74bc3d4f3bb', -1, 1713870614, 1713870614, '03ee7582', 0, 0, 0)

Line : 187
File : sessions.php