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 ('703e7000a9c9de9ff1711f47d4b10529', -1, 1713926545, 1713926545, '0391ba06', -4, 0, 0)

Line : 187
File : sessions.php