diff --git a/build.gradle b/build.gradle
index 18b2e90..cbd48b8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -29,9 +29,6 @@ sourceCompatibility = 1.8
 dependencies {
     api project(":common")
     api 'io.prometheus:simpleclient:0.12.0'
-    api 'org.knowhowlab.osgi:sigar:1.6.5_01'
-    api 'org.bdware.doip:doip-sdk:1.1.0'
-
-    api fileTree(dir: 'libs', include: '*.jar')
+    api 'org.hyperic.sigar:sigar:1.6.4'
     testImplementation 'junit:junit:4.13.2'
 }
diff --git a/src/main/java/org/bdware/sc/ContractClient.java b/src/main/java/org/bdware/sc/ContractClient.java
index e4fb730..b938bee 100644
--- a/src/main/java/org/bdware/sc/ContractClient.java
+++ b/src/main/java/org/bdware/sc/ContractClient.java
@@ -428,10 +428,6 @@ public class ContractClient {
     }
 
 
-    public String signResult(String result) {
-        return contractMeta.contract.signResult(result);
-    }
-
     public String getPubkey() {
         return contractMeta.contract.getPublicKey();
     }
diff --git a/src/main/java/org/bdware/sc/ContractManager.java b/src/main/java/org/bdware/sc/ContractManager.java
index 90f5627..e4dcaba 100644
--- a/src/main/java/org/bdware/sc/ContractManager.java
+++ b/src/main/java/org/bdware/sc/ContractManager.java
@@ -32,8 +32,6 @@ import org.zz.gmhelper.SM2KeyPair;
 import org.zz.gmhelper.SM2Util;
 
 import java.io.*;
-import java.lang.reflect.Method;
-import java.lang.reflect.Parameter;
 import java.text.SimpleDateFormat;
 import java.util.*;
 import java.util.concurrent.*;
@@ -116,6 +114,7 @@ public class ContractManager {
         eventBroker = new EventBroker();
         statusRecorder = new ContractStatusRecorder("./ContractManagerDB");
         multiContractRecorder = new MultiContractRecorder("./ContractManagerDB");
+        multiContractRecorder.removeNotExist(statusRecorder);
         projectRecoder = new ProjectRecorder("./ContractManagerDB");
     }
 
@@ -985,17 +984,16 @@ public class ContractManager {
     }
 
     private void setContractDOI(Contract c) {
-        if (DoConfig.callContractUsingDOI) {
-            ContractManifest cm = YJSPacker.getManifest(c.getScriptStr());
-            if (cm != null && cm.doi != null) {
-                if (!cm.doi.equals("")
-                        && !cm.doi.equals("null")
-                        && c.getType() == ContractExecType.Sole && chainOpener != null) {
-                    c.setDOI(cm.doi);
-                    c.setBuildTime(cm.buildTime);
-                    c.setDoipFlag(true);
-                    chainOpener.reRegister(cm.doi);
-                }
+        //@TODO  add Automatically register a doi instead.
+        ContractManifest cm = YJSPacker.getManifest(c.getScriptStr());
+        if (cm != null && cm.doi != null) {
+            if (!cm.doi.equals("")
+                    && !cm.doi.equals("null")
+                    && c.getType() == ContractExecType.Sole && chainOpener != null) {
+                c.setDOI(cm.doi);
+                c.setBuildTime(cm.buildTime);
+                c.setDoipFlag(true);
+                chainOpener.reRegister(cm.doi);
             }
         } else {
             c.setDoipFlag(false);
diff --git a/src/main/java/org/bdware/sc/MultiContractRecorder.java b/src/main/java/org/bdware/sc/MultiContractRecorder.java
index 64b8ee4..8d6f779 100644
--- a/src/main/java/org/bdware/sc/MultiContractRecorder.java
+++ b/src/main/java/org/bdware/sc/MultiContractRecorder.java
@@ -7,6 +7,9 @@ import org.bdware.sc.db.KeyValueDBUtil;
 import org.bdware.sc.db.StatusRecorder;
 import org.bdware.sc.units.MultiContractMeta;
 
+import java.util.HashSet;
+import java.util.Set;
+
 public class MultiContractRecorder extends StatusRecorder<MultiContractMeta> {
     static final String dbName = CMTables.UnitContracts.toString();
     static final String prefix = "Multi_C_Meta_";
@@ -49,4 +52,14 @@ public class MultiContractRecorder extends StatusRecorder<MultiContractMeta> {
         }
         return ret;
     }
+
+    public void removeNotExist(ContractStatusRecorder statusRecorder) {
+        Set<MultiContractMeta> toRemove = new HashSet<>();
+        for (String key : getStatus().keySet()) {
+            if (statusRecorder.getContractMeta(key) == null)
+                toRemove.add(getStatus().get(key));
+        }
+        for (MultiContractMeta meta : toRemove)
+            remove(meta);
+    }
 }