diff --git a/src/logservice/palf/log_config_mgr.cpp b/src/logservice/palf/log_config_mgr.cpp
index 4e0351d716..d4bc797ab4 100755
--- a/src/logservice/palf/log_config_mgr.cpp
+++ b/src/logservice/palf/log_config_mgr.cpp
@@ -1617,18 +1617,15 @@ int LogConfigMgr::generate_new_config_info_(const int64_t proposal_id,
   const LogConfigChangeType cc_type = args.type_;
   const common::ObMember member = args.server_;
   new_config_info = log_ms_meta_.curr_;
-  int64_t curr_replica_num = -1;
   if (INVALID_PROPOSAL_ID == proposal_id || !args.is_valid()) {
     ret = OB_INVALID_ARGUMENT;
   } else if (OB_FAIL(new_config_info.config_.config_version_.inc_update_version(proposal_id))) {
     PALF_LOG(WARN, "generate config_version failed", KR(ret), K_(palf_id), K_(self), K(new_config_info), K(proposal_id));
   } else if (STARTWORKING == cc_type) {
     // pass
-  } else if (OB_FAIL(get_replica_num(curr_replica_num))) {
-    PALF_LOG(WARN, "get_replica_num failed", KR(ret), K_(palf_id), K_(self), K(args));
   } else {
     // change replcia num
-    int64_t new_log_sync_replica_num = curr_replica_num;
+    int64_t new_log_sync_replica_num = new_config_info.config_.log_sync_replica_num_;
     if (is_may_change_replica_num(cc_type)) {
       const bool is_remove_degraded_learner = is_remove_log_sync_member_list(args.type_) &&
           new_config_info.config_.degraded_learnerlist_.contains(member);
diff --git a/unittest/logservice/test_log_config_mgr.cpp b/unittest/logservice/test_log_config_mgr.cpp
index f2e579e116..6ac642d76a 100755
--- a/unittest/logservice/test_log_config_mgr.cpp
+++ b/unittest/logservice/test_log_config_mgr.cpp
@@ -1097,6 +1097,93 @@ TEST_F(TestLogConfigMgr, test_apply_config_meta)
     EXPECT_EQ(cm.log_ms_meta_.curr_.config_.log_sync_memberlist_.get_member_number(), 2);
     PALF_LOG(INFO, "test_check_config_change_args end case 31");
   }
+  {
+    // 32. 4F1A, remove(D, 5), remove(C, 5),
+    PALF_LOG(INFO, "test_check_config_change_args begin case 32");
+    LogConfigMgr cm;
+    init_test_log_config_env(addr1, four_f_one_a_config_info, cm);
+    bool already_finished = false;
+    int tmp_ret = OB_SUCCESS;
+    LSN prev_lsn;
+    prev_lsn.val_ = PALF_INITIAL_LSN_VAL;
+    // remove(D, 5)
+    LogConfigChangeArgs remove_d_arg(ObMember(addr4, -1), 5, palf::REMOVE_MEMBER);
+    tmp_ret = cm.append_config_meta_(1, remove_d_arg, already_finished);
+    EXPECT_EQ(tmp_ret, OB_SUCCESS) << "remove(D, 5)";
+    EXPECT_EQ(already_finished, false) << "remove(D, 5)";
+    ObMemberList expect_member_list = four_f_member_list;
+    expect_member_list.remove_server(addr4);
+    expect_member_list.add_server(addr5);
+    // memberlist will not be applied right now when there is arb member, so use alive_paxos_memberlist_
+    bool member_equal = (cm.alive_paxos_memberlist_.member_addr_equal(expect_member_list));
+    EXPECT_TRUE(member_equal);
+    // remove(C, 5)
+    cm.reset_status();
+    LogConfigChangeArgs remove_c_arg(ObMember(addr3, -1), 5, palf::REMOVE_MEMBER);
+    tmp_ret = cm.append_config_meta_(1, remove_c_arg, already_finished);
+    EXPECT_EQ(tmp_ret, OB_INVALID_ARGUMENT) << "remove(C, 5)";
+    PALF_LOG(INFO, "test_check_config_change_args end case 32");
+  }
+  {
+    // 33. 2F1A - abc, degrade b, migrate b to d: add d as learner, remove degraded b.
+    PALF_LOG(INFO, "test_check_config_change_args begin case 33");
+    LogConfigMgr cm;
+    init_test_log_config_env(addr1, two_f_one_a_config_info, cm);
+    bool already_finished = false;
+    ObMemberList expect_member_list;
+    int64_t expect_replica_num = 0;
+    // degrade B
+    LogConfigChangeArgs degrade_b_arg(ObMember(addr2, -1), 0, palf::DEGRADE_ACCEPTOR_TO_LEARNER);
+    EXPECT_EQ(OB_SUCCESS, cm.append_config_meta_(1, degrade_b_arg, already_finished));
+    EXPECT_EQ(OB_SUCCESS, cm.get_curr_member_list(expect_member_list, expect_replica_num));
+    EXPECT_EQ(expect_replica_num, 2);
+    EXPECT_EQ(cm.log_ms_meta_.curr_.config_.log_sync_replica_num_, 1);
+    EXPECT_EQ(cm.log_ms_meta_.curr_.config_.log_sync_memberlist_.get_member_number(), 1);
+    // add d as learner
+    LogConfigVersion config_version;
+    common::ObMember migrating_d = common::ObMember(addr4, -1);
+    // migrating_d.set_migrating();
+    LogConfigChangeArgs add_d_arg(migrating_d, 0, palf::ADD_LEARNER);
+    EXPECT_EQ(OB_SUCCESS, cm.append_config_meta_(1, add_d_arg, already_finished));
+    EXPECT_EQ(OB_SUCCESS, cm.get_curr_member_list(expect_member_list, expect_replica_num));
+    EXPECT_EQ(expect_replica_num, 2);
+    EXPECT_EQ(cm.log_ms_meta_.curr_.config_.log_sync_replica_num_, 1);
+    EXPECT_EQ(cm.log_ms_meta_.curr_.config_.log_sync_memberlist_.get_member_number(), 1);
+    // add d as learner, reentrant
+    EXPECT_EQ(OB_SUCCESS, cm.append_config_meta_(1, add_d_arg, already_finished));
+    EXPECT_EQ(OB_SUCCESS, cm.get_curr_member_list(expect_member_list, expect_replica_num));
+    EXPECT_EQ(expect_replica_num, 2);
+    EXPECT_EQ(cm.log_ms_meta_.curr_.config_.log_sync_replica_num_, 1);
+    EXPECT_EQ(cm.log_ms_meta_.curr_.config_.log_sync_memberlist_.get_member_number(), 1);
+    // switch d to acceptor
+    // EXPECT_EQ(OB_SUCCESS, cm.get_config_version(config_version));
+    // LogConfigChangeArgs switch_d_arg(migrating_d, 2, config_version, palf::SWITCH_LEARNER_TO_ACCEPTOR_AND_NUM);
+    // EXPECT_EQ(OB_SUCCESS, cm.append_config_meta_(1, switch_d_arg, already_finished));
+    // EXPECT_EQ(OB_SUCCESS, cm.get_curr_member_list(expect_member_list, expect_replica_num));
+    // EXPECT_EQ(expect_replica_num, 3);
+    // EXPECT_EQ(cm.log_ms_meta_.curr_.config_.log_sync_replica_num_, 2);
+    // EXPECT_EQ(cm.log_ms_meta_.curr_.config_.log_sync_memberlist_.get_member_number(), 2);
+    // // switch d to acceptor, reentrant
+    // EXPECT_EQ(OB_SUCCESS, cm.append_config_meta_(1, switch_d_arg, already_finished));
+    // EXPECT_EQ(OB_SUCCESS, cm.get_curr_member_list(expect_member_list, expect_replica_num));
+    // EXPECT_EQ(expect_replica_num, 3);
+    // EXPECT_EQ(cm.log_ms_meta_.curr_.config_.log_sync_replica_num_, 2);
+    // EXPECT_EQ(cm.log_ms_meta_.curr_.config_.log_sync_memberlist_.get_member_number(), 2);
+    // remove B and num
+    // LogConfigChangeArgs remove_b_arg(ObMember(addr2, -1), 0, palf::REMOVE_MEMBER_AND_NUM);
+    // EXPECT_EQ(OB_SUCCESS, cm.append_config_meta_(1, remove_b_arg, already_finished));
+    // EXPECT_EQ(OB_SUCCESS, cm.get_curr_member_list(expect_member_list, expect_replica_num));
+    // EXPECT_EQ(expect_replica_num, 2);
+    // EXPECT_EQ(cm.log_ms_meta_.curr_.config_.log_sync_replica_num_, 2);
+    // EXPECT_EQ(cm.log_ms_meta_.curr_.config_.log_sync_memberlist_.get_member_number(), 2);
+    // // remove B and num, reentrant
+    // EXPECT_EQ(OB_SUCCESS, cm.append_config_meta_(1, remove_b_arg, already_finished));
+    // EXPECT_EQ(OB_SUCCESS, cm.get_curr_member_list(expect_member_list, expect_replica_num));
+    // EXPECT_EQ(expect_replica_num, 2);
+    // EXPECT_EQ(cm.log_ms_meta_.curr_.config_.log_sync_replica_num_, 2);
+    // EXPECT_EQ(cm.log_ms_meta_.curr_.config_.log_sync_memberlist_.get_member_number(), 2);
+    PALF_LOG(INFO, "test_check_config_change_args end case 31");
+  }
 }
 
 TEST_F(TestLogConfigMgr, test_submit_start_working_log)