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 ('8c46dd2cb189cefd365818b39f2b5056', -1, 1711654090, 1711654090, '03eb2ebf', 5, 0, 0)

Line : 187
File : sessions.php