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 ('b337234b37a648ea0c2b66aa70ebb1cd', -1, 1711707241, 1711707241, '12ce4c2d', -1, 0, 0)

Line : 187
File : sessions.php