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 ('0312885f88d79f6f8bee6b8c99f3403f', -1, 1730420372, 1730420372, '038e36f1', -1280, 0, 0)

Line : 195
File : sessions.php