From 4132af8f5ece92e4ed84c7c7718480d0b5359d77 Mon Sep 17 00:00:00 2001
From: "everywhere.z" <weenyc31@163.com>
Date: Fri, 5 Dec 2025 18:11:29 +0800
Subject: [PATCH] =?UTF-8?q?bug=20#IDB16L=20=E5=BC=82=E6=AD=A5=E5=BE=AA?=
 =?UTF-8?q?=E7=8E=AF=E4=B8=AD=E5=88=B0=E4=B8=80=E4=B8=AAchain=EF=BC=8Cchai?=
 =?UTF-8?q?n=E9=87=8C=E9=9D=A2=E6=9C=89when=EF=BC=8C=E4=BC=9A=E6=8A=A5?=
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---
 liteflow-core/src/main/java/com/yomahub/liteflow/slot/Slot.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/slot/Slot.java b/liteflow-core/src/main/java/com/yomahub/liteflow/slot/Slot.java
index 4bceefbb5..3b02a5efd 100644
--- a/liteflow-core/src/main/java/com/yomahub/liteflow/slot/Slot.java
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/slot/Slot.java
@@ -140,7 +140,7 @@ public class Slot {
 			// NullPointerException
 			throw new NullParamException("data slot can't accept null param");
 		}
-		metaDataMap.put(key, t);
+        metaDataMap.putIfAbsent(key, t);
 	}
 
 	public <T> T getInput(String nodeId) {