diff --git a/_Sidebar.md b/_Sidebar.md
index 633de0d..cb7482b 100644
--- a/_Sidebar.md
+++ b/_Sidebar.md
@@ -11,7 +11,6 @@
 - [[CF1187E|CF1187E]]
 - [[CF1380D|CF1380D]]
 - [[CF1912E|CF1912E]]
-- [[CSPS2026|CSPS2026]]
 - [[P1453|P1453]]
 - [[P2016|P2016]]
 - [[P2607|P2607]]