diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbCopyKeysNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbCopyKeysNode.java
index a9de122bfc..4612430f50 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbCopyKeysNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbCopyKeysNode.java
@@ -29,8 +29,8 @@ import org.thingsboard.server.common.data.plugin.ComponentType;
 import org.thingsboard.server.common.msg.TbMsg;
 import org.thingsboard.server.common.msg.TbMsgMetaData;
 
-import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.concurrent.ExecutionException;
 import java.util.regex.Pattern;
 
@@ -58,7 +58,7 @@ public class TbCopyKeysNode implements TbNode {
 
     @Override
     public void onMsg(TbContext ctx, TbMsg msg) throws ExecutionException, InterruptedException, TbNodeException {
-        List<String> keys = config.getKeys();
+        Set<String> keys = config.getKeys();
         TbMsgMetaData metaData = msg.getMetaData();
         String msgData = msg.getData();
         JsonNode dataNode = JacksonUtil.toJsonNode(msgData);
diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbCopyKeysNodeConfiguration.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbCopyKeysNodeConfiguration.java
index 5e747fdd30..b56a181fa6 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbCopyKeysNodeConfiguration.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbCopyKeysNodeConfiguration.java
@@ -19,18 +19,18 @@ import lombok.Data;
 import org.thingsboard.rule.engine.api.NodeConfiguration;
 
 import java.util.Collections;
-import java.util.List;
+import java.util.Set;
 
 @Data
 public class TbCopyKeysNodeConfiguration implements NodeConfiguration<TbCopyKeysNodeConfiguration> {
 
     private boolean fromMetadata;
-    private List<String> keys;
+    private Set<String> keys;
 
     @Override
     public TbCopyKeysNodeConfiguration defaultConfiguration() {
         TbCopyKeysNodeConfiguration configuration = new TbCopyKeysNodeConfiguration();
-        configuration.setKeys(Collections.emptyList());
+        configuration.setKeys(Collections.emptySet());
         configuration.setFromMetadata(false);
         return configuration;
     }
diff --git a/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/transform/TbCopyKeysNodeTest.java b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/transform/TbCopyKeysNodeTest.java
index 5a7147b65d..65739d6ff5 100644
--- a/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/transform/TbCopyKeysNodeTest.java
+++ b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/transform/TbCopyKeysNodeTest.java
@@ -32,8 +32,8 @@ import org.thingsboard.server.common.msg.TbMsgMetaData;
 import org.thingsboard.server.common.msg.queue.TbMsgCallback;
 
 import java.util.Collections;
-import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.UUID;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -60,7 +60,7 @@ public class TbCopyKeysNodeTest {
         callback = mock(TbMsgCallback.class);
         ctx = mock(TbContext.class);
         config = new TbCopyKeysNodeConfiguration().defaultConfiguration();
-        config.setKeys(List.of("TestKey_1", "TestKey_2", "TestKey_3", "(\\w*)Data(\\w*)"));
+        config.setKeys(Set.of("TestKey_1", "TestKey_2", "TestKey_3", "(\\w*)Data(\\w*)"));
         config.setFromMetadata(true);
         nodeConfiguration = new TbNodeConfiguration(mapper.valueToTree(config));
         node = spy(new TbCopyKeysNode());
@@ -80,7 +80,7 @@ public class TbCopyKeysNodeTest {
     @Test
     void givenDefaultConfig_whenVerify_thenOK() {
         TbCopyKeysNodeConfiguration defaultConfig = new TbCopyKeysNodeConfiguration().defaultConfiguration();
-        assertThat(defaultConfig.getKeys()).isEqualTo(Collections.emptyList());
+        assertThat(defaultConfig.getKeys()).isEqualTo(Collections.emptySet());
         assertThat(defaultConfig.isFromMetadata()).isEqualTo(false);
     }