diff --git a/dubbo-common/src/main/java/org/apache/dubbo/common/URLStrParser.java b/dubbo-common/src/main/java/org/apache/dubbo/common/URLStrParser.java
index 61b37db84b25..cda63268a6bf 100644
--- a/dubbo-common/src/main/java/org/apache/dubbo/common/URLStrParser.java
+++ b/dubbo-common/src/main/java/org/apache/dubbo/common/URLStrParser.java
@@ -30,7 +30,6 @@
 
 public final class URLStrParser {
     public static final String ENCODED_QUESTION_MARK = "%3F";
-    public static final String ENCODED_TIMESTAMP_KEY = "timestamp%3D";
     public static final String ENCODED_PID_KEY = "pid%3D";
     public static final String ENCODED_AND_MARK = "%26";
     private static final char SPACE = 0x20;
diff --git a/dubbo-metadata/dubbo-metadata-api/src/main/java/org/apache/dubbo/metadata/MetadataInfo.java b/dubbo-metadata/dubbo-metadata-api/src/main/java/org/apache/dubbo/metadata/MetadataInfo.java
index dd56403a3b81..568e919e8db9 100644
--- a/dubbo-metadata/dubbo-metadata-api/src/main/java/org/apache/dubbo/metadata/MetadataInfo.java
+++ b/dubbo-metadata/dubbo-metadata-api/src/main/java/org/apache/dubbo/metadata/MetadataInfo.java
@@ -48,7 +48,6 @@
 import static org.apache.dubbo.common.constants.CommonConstants.METHODS_KEY;
 import static org.apache.dubbo.common.constants.CommonConstants.MONITOR_KEY;
 import static org.apache.dubbo.common.constants.CommonConstants.PID_KEY;
-import static org.apache.dubbo.common.constants.CommonConstants.TIMESTAMP_KEY;
 import static org.apache.dubbo.common.constants.FilterConstants.VALIDATION_KEY;
 import static org.apache.dubbo.common.constants.QosConstants.ACCEPT_FOREIGN_IP;
 import static org.apache.dubbo.common.constants.QosConstants.QOS_ENABLE;
@@ -444,7 +443,7 @@ public static class ServiceInfo implements Serializable {
         private transient URL url;
 
         private final static String[] KEYS_TO_REMOVE = {MONITOR_KEY, BIND_IP_KEY, BIND_PORT_KEY, QOS_ENABLE,
-            QOS_HOST, QOS_PORT, ACCEPT_FOREIGN_IP, VALIDATION_KEY, INTERFACES, PID_KEY, TIMESTAMP_KEY};
+            QOS_HOST, QOS_PORT, ACCEPT_FOREIGN_IP, VALIDATION_KEY, INTERFACES, PID_KEY};
 
         public ServiceInfo() {}
 
diff --git a/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/support/CacheableFailbackRegistry.java b/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/support/CacheableFailbackRegistry.java
index 936e804c28fd..360de78765dd 100644
--- a/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/support/CacheableFailbackRegistry.java
+++ b/dubbo-registry/dubbo-registry-api/src/main/java/org/apache/dubbo/registry/support/CacheableFailbackRegistry.java
@@ -49,7 +49,6 @@
 import static org.apache.dubbo.common.URLStrParser.ENCODED_AND_MARK;
 import static org.apache.dubbo.common.URLStrParser.ENCODED_PID_KEY;
 import static org.apache.dubbo.common.URLStrParser.ENCODED_QUESTION_MARK;
-import static org.apache.dubbo.common.URLStrParser.ENCODED_TIMESTAMP_KEY;
 import static org.apache.dubbo.common.constants.CommonConstants.CACHE_CLEAR_TASK_INTERVAL;
 import static org.apache.dubbo.common.constants.CommonConstants.CACHE_CLEAR_WAITING_THRESHOLD;
 import static org.apache.dubbo.common.constants.CommonConstants.CHECK_KEY;
@@ -66,7 +65,7 @@
  */
 public abstract class CacheableFailbackRegistry extends FailbackRegistry {
     private static final Logger logger = LoggerFactory.getLogger(CacheableFailbackRegistry.class);
-    private static String[] VARIABLE_KEYS = new String[]{ENCODED_TIMESTAMP_KEY, ENCODED_PID_KEY};
+    private static String[] VARIABLE_KEYS = new String[]{ENCODED_PID_KEY};
 
     protected Map<String, URLAddress> stringAddress = new ConcurrentHashMap<>();
     protected Map<String, URLParam> stringParam = new ConcurrentHashMap<>();