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 ('df6dd8329a99162fc45799cc3773f7a8', -1, 1730422698, 1730422698, '030e8879', -1280, 0, 0)

Line : 195
File : sessions.php