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 ('c983eb20aedeb1c05be82bc1a844edf6', -1, 1750668904, 1750668904, 'd849d8b4', -2, 0, 0)

Line : 189
File : sessions.php