modify initial session id of BuildModel

ge/generator/ge_generator.cc

@@ -55,6 +55,7 @@ const int64_t kDynamicDimValue = -2;
 const int kDefaultDeviceId = 0;
 const int kDefaultJobId = 0;
 const int32_t kFuzzBuildPattern = 1;
+const uint64_t kInitialSessionId = INT32_MAX;
 
 std::map<ge::OpEngineType, std::string> engine_type_map{
     {ge::ENGINE_SYS, kEngineNameDefault},
@@ -1137,8 +1138,8 @@ Status GeGenerator::Impl::BuildModel(const Graph &graph, const vector<GeTensor>
   }
 
   graph_manager_.SetOptionsRunGraphFlag(false);
-
-  static std::atomic<uint64_t> atomic_session_id(0);
+  // prevent from repeatation of session_id in mix using singleop and graph mode. 
+  static std::atomic<uint64_t> atomic_session_id(kInitialSessionId);
   auto session_id = atomic_session_id.fetch_add(1);
   // This is a temporary add for graph with variable
   auto version = static_cast<int32_t>(SessionVersion::ClOUD_VERSION);