diff --git a/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java b/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java
index 96f3ac85..9ac58123 100644
--- a/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java
+++ b/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java
@@ -593,7 +593,7 @@ public class AihrPracticeSeedService {
             ReviewDetailResponse detail = reviewDetail(id);
             String extPartyId = reviewExtPartyId(id);
             createAssignment(new PracticeAssignmentRequest(
-                firstNonBlank(extPartyId, detail == null ? "mobile-user" : detail.trainee()),
+                firstNonBlank(extPartyId, ""),
                 detail == null ? "待复盘员工" : detail.trainee(),
                 request.nextScenarioId(),
                 null,
@@ -876,11 +876,14 @@ public class AihrPracticeSeedService {
     }
 
     public PracticeAssignmentResponse createAssignment(PracticeAssignmentRequest request) {
+        String extPartyId = request == null ? "" : firstNonBlank(request.extPartyId(), "");
+        if (isBlank(extPartyId)) {
+            throw new ServiceException("缺少员工ID，无法派发专项训练");
+        }
         ensureAssignmentTable();
         LocalDateTime now = LocalDateTime.now();
         String scenarioId = firstNonBlank(request == null ? null : request.scenarioId(), "fee-parking");
         ScenarioSeed scenario = resolveScenario(scenarioId, null);
-        String extPartyId = firstNonBlank(request == null ? null : request.extPartyId(), "mobile-user");
         String traineeName = firstNonBlank(request == null ? null : request.traineeName(), extPartyId);
         String source = firstNonBlank(request == null ? null : request.source(), "manual");
         String reason = firstNonBlank(request == null ? null : request.reason(), "主管派发专项训练");
diff --git a/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrPracticeSeedServiceTest.java b/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrPracticeSeedServiceTest.java
new file mode 100644
index 00000000..832c7731
--- /dev/null
+++ b/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrPracticeSeedServiceTest.java
@@ -0,0 +1,27 @@
+package org.dromara.aihr.service;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.dromara.aihr.domain.AihrPracticeDto.PracticeAssignmentRequest;
+import org.dromara.common.core.exception.ServiceException;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class AihrPracticeSeedServiceTest {
+
+    @Test
+    public void createAssignmentRequiresExtPartyId() {
+        AihrPracticeSeedService service = new AihrPracticeSeedService(new ObjectMapper(), null, null, null);
+
+        ServiceException error = assertThrows(ServiceException.class, () -> service.createAssignment(new PracticeAssignmentRequest(
+            "",
+            "测试员工",
+            "fee-parking",
+            null,
+            "manual",
+            "主管派发专项训练"
+        )));
+        assertEquals("缺少员工ID，无法派发专项训练", error.getMessage());
+    }
+}