[pten] fix wrong variable name in PreparePtenData (#39311)

paddle/fluid/framework/operator.cc

@@ -1877,6 +1877,7 @@ Scope* OperatorWithKernel::PreparePtenData(
                         "the size of kernel input_defs (%d).",
                         input_names.size(), input_defs.size()));
   Scope* new_scope = nullptr;
+  auto& name_map = Inputs();
   const std::unordered_set<std::string>* no_buffer_ins = nullptr;
   if (info_) {
     auto& no_buffer_inferer = info_->NoNeedBufferVarsInferer();
@@ -1890,6 +1891,7 @@ Scope* OperatorWithKernel::PreparePtenData(
   for (size_t i = 0; i < input_defs.size(); ++i) {
     auto& in_def = input_defs.at(i);
     auto& ins_vector = ctx->inputs.at(input_names[i]);
+    auto& name_vec = name_map.at(input_names[i]);
     bool should_skip_input =
         no_buffer_ins && no_buffer_ins->count(input_names[i]) > 0;
 
@@ -1927,7 +1929,7 @@ Scope* OperatorWithKernel::PreparePtenData(
       }
 
       // Create new var with the same name in transfer scopes
-      auto* trans_var = new_scope->Var(input_names[i]);
+      auto* trans_var = new_scope->Var(name_vec[offset]);
       ins_vector[offset] = trans_var;
 
       // Do transfer