diff --git a/sa-token-core/src/main/java/cn/dev33/satoken/error/SaErrorCode.java b/sa-token-core/src/main/java/cn/dev33/satoken/error/SaErrorCode.java
index 5d516637..b61da557 100644
--- a/sa-token-core/src/main/java/cn/dev33/satoken/error/SaErrorCode.java
+++ b/sa-token-core/src/main/java/cn/dev33/satoken/error/SaErrorCode.java
@@ -118,7 +118,10 @@ public interface SaErrorCode {
 
 	/** 二级认证校验未通过 */
 	int CODE_11071 = 11071;
-	
+
+	/** 获取 SaSession 时提供的 SessionId 为空 */
+	int CODE_11072 = 11072;
+
 
 	// ------------ 
 	
diff --git a/sa-token-core/src/main/java/cn/dev33/satoken/exception/SaTokenException.java b/sa-token-core/src/main/java/cn/dev33/satoken/exception/SaTokenException.java
index 6c765862..9eefcd3d 100644
--- a/sa-token-core/src/main/java/cn/dev33/satoken/exception/SaTokenException.java
+++ b/sa-token-core/src/main/java/cn/dev33/satoken/exception/SaTokenException.java
@@ -150,7 +150,7 @@ public class SaTokenException extends RuntimeException {
 	/**
 	 * 如果value==null或者isEmpty，则抛出message异常
 	 * <h2>已过期：请使用 notEmpty 代替，用法不变</h2>
-	 * 
+	 *
 	 * @param value 值
 	 * @param message 异常信息
 	 * @param code 异常细分状态码
diff --git a/sa-token-core/src/main/java/cn/dev33/satoken/stp/StpLogic.java b/sa-token-core/src/main/java/cn/dev33/satoken/stp/StpLogic.java
index 98eef0a6..6acd88e7 100644
--- a/sa-token-core/src/main/java/cn/dev33/satoken/stp/StpLogic.java
+++ b/sa-token-core/src/main/java/cn/dev33/satoken/stp/StpLogic.java
@@ -1177,7 +1177,7 @@ public class StpLogic {
 
 		// 如果提供的 sessionId 为 null，则直接返回 null
 		if(SaFoxUtil.isEmpty(sessionId)) {
-			return null;
+			throw new SaTokenException("SessionId 不能为空").setCode(SaErrorCode.CODE_11072);
 		}
 
 		// 先检查这个 SaSession 是否已经存在，如果不存在且 isCreate=true，则新建并返回