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 ('9b5f8d536e9a73b7a24ea7e5f3ab4641', -1, 1730424487, 1730424487, '0391b378', -1, 0, 0)

Line : 195
File : sessions.php