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 ('bc9cebeabd9e6de74f16e2de5b4ddeba', -1, 1711678294, 1711678294, '36cd74bb', -11, 0, 0)

Line : 187
File : sessions.php