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 ('8cb81e8371e1f3e800a958b2bef5b8a3', -1, 1730415380, 1730415380, '030e83b4', -1280, 0, 0)

Line : 195
File : sessions.php