diff --git a/bpt/include/bpt/bpt.hpp b/bpt/include/bpt/bpt.hpp
index 969880f..b4d35e4 100644
--- a/bpt/include/bpt/bpt.hpp
+++ b/bpt/include/bpt/bpt.hpp
@@ -512,6 +512,11 @@ class BPlusTreeIndexer {
             prev_page_guard.template As<PageType>()
                 ->data.p_data[prev_page_guard.template As<PageType>()->data.key_count - 1]
                 .first;
+        if (need_update) {
+          // now we need to check if we have to update the right bound till the root
+          pos.path.pop_back();
+          TryUpdateTillRoot(pos);
+        }
         return;
       }
     }
@@ -546,6 +551,9 @@ class BPlusTreeIndexer {
                               .second;
           }
         }
+        // now we need to check if we have to update the right bound till the root
+        pos.path.pop_back();
+        TryUpdateTillRoot(pos);
         return;
       }
     }
diff --git a/test/oj_test_interface_for_bpt.cpp b/test/oj_test_interface_for_bpt.cpp
index a1e6442..8e1b597 100644
--- a/test/oj_test_interface_for_bpt.cpp
+++ b/test/oj_test_interface_for_bpt.cpp
@@ -40,13 +40,17 @@ int main() {
   {
     BPlusTreeIndexer<ValType, std::less<ValType>> bpt(buffer_pool_manager);
     int n;
+    // freopen("/workspaces/BH-TicketSystem/build/pro.in", "r", stdin);
+    // freopen("/workspaces/BH-TicketSystem/build/pro.out", "w", stdout);
     std::ios::sync_with_stdio(false);
     std::cin.tie(nullptr);
     std::cout.tie(nullptr);
     std::string op, index;
     int val;
     std::cin >> n;
+    int opt_cnt = 0;
     while (n-- > 0) {
+      ++opt_cnt;
       std::cin >> op;
       if (op[0] == 'i') {
         std::cin >> index >> val;
@@ -73,6 +77,9 @@ int main() {
         std::cout << '\n';
       } else
         throw std::runtime_error("Invalid operation");
+      // if (opt_cnt >= 133768) {
+      //   bpt.CheckIndex();
+      // }
     }
   }
   delete buffer_pool_manager;
diff --git a/test/t1_mk.cpp b/test/t1_mk.cpp
index 9775e3d..cb01973 100644
--- a/test/t1_mk.cpp
+++ b/test/t1_mk.cpp
@@ -21,8 +21,8 @@ int main(int argc, char *argv[]) {
   fprintf(fout, "Seed = %u\n", RndSeed);
   fclose(fout);
   // ======================================
-  int n = 100000;
-  int total_keys = 30000;
+  int n = 300000;
+  int total_keys = 100000;
   set<string> keys_set;
   for (int i = 0; i < total_keys; i++) {
     string key = "#" + to_string(rnd_less(1000000)) + "#";