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 ('23a64bb9a0b821999f605b667dac95e2', -1, 1730474998, 1730474998, '340f8271', -1, 0, 0)

Line : 195
File : sessions.php