diff --git a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/WpsExecutor.java b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/WpsExecutor.java
index a19b21a..c1a18c0 100644
--- a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/WpsExecutor.java
+++ b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/WpsExecutor.java
@@ -346,7 +346,7 @@ public class WpsExecutor implements WpsApi {
     }
 
     protected WpsDocEntity doCreateBlankDoc(Long userId, String docxUrl, Long projectId) {
-        if(Objects.nonNull(projectId)) {
+        if(Objects.isNull(projectId)) {
             throw new BizException(ErrorCode.EVAL_PROJECT_ERROR);
         }
         String resDocxUrl = !StringUtils.hasText(docxUrl) ? defDocxUrl : docxUrl;