diff --git a/src/learn/gensfen.cpp b/src/learn/gensfen.cpp
index 4050d983..3d015acf 100644
--- a/src/learn/gensfen.cpp
+++ b/src/learn/gensfen.cpp
@@ -1022,11 +1022,6 @@ namespace Learner
                 cout << "Error! : Illegal token " << token << endl;
         }
 
-#if defined(USE_GLOBAL_OPTIONS)
-        // Save it for later restore.
-        auto oldGlobalOptions = GlobalOptions;
-#endif
-
         // If search depth2 is not set, leave it the same as search depth.
         if (search_depth_max == INT_MIN)
             search_depth_max = search_depth_min;
@@ -1103,12 +1098,6 @@ namespace Learner
         }
 
         std::cout << "gensfen finished." << endl;
-
-#if defined(USE_GLOBAL_OPTIONS)
-        // Restore Global Options.
-        GlobalOptions = oldGlobalOptions;
-#endif
-
     }
 }
 #endif
diff --git a/src/learn/learner.cpp b/src/learn/learner.cpp
index 9e6f10cb..daea9594 100644
--- a/src/learn/learner.cpp
+++ b/src/learn/learner.cpp
@@ -1636,13 +1636,6 @@ namespace Learner
         uint64_t eta1_epoch = 0; // eta2 is not applied by default
         uint64_t eta2_epoch = 0; // eta3 is not applied by default
 
-#if defined(USE_GLOBAL_OPTIONS)
-    // Save it for later restore.
-        auto oldGlobalOptions = GlobalOptions;
-        // If you hit the replacement table, pruning may occur at the previous evaluation value, so turn it off.
-        GlobalOptions.use_hash_probe = false;
-#endif
-
         // --- Function that only shuffles the teacher aspect
 
         // normal shuffle
@@ -2072,11 +2065,6 @@ namespace Learner
 
         // Save once at the end.
         learn_think.save(true);
-
-#if defined(USE_GLOBAL_OPTIONS)
-        // Restore Global Options.
-        GlobalOptions = oldGlobalOptions;
-#endif
     }
 
 } // namespace Learner
diff --git a/src/search.cpp b/src/search.cpp
index 8f258ae4..67348a2b 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -2070,17 +2070,6 @@ namespace Learner
         rootMoves.push_back(Search::RootMove(m));
 
       assert(!rootMoves.empty());
-
-      //#if defined(USE_GLOBAL_OPTIONS)
-      // Since the generation of the substitution table for each search thread should be managed,
-      // Increase the generation of the substitution table for this thread because it is a new search.
-            //TT.new_search(th->thread_id());
-
-            // ª If you call new_search here, it may be a loss because you can't use the previous search result.
-            // Do not do this here, but caller should do TT.new_search(th->thread_id()) for each station ...
-
-            // ¨Because we want to avoid reaching the same final diagram, use the substitution table commonly for all threads when generating teachers.
-      //#endif
     }
   }