diff --git a/physical-module-system/physical-system-biz/src/main/java/org/jeecg/modules/database/entity/Experiment.java b/physical-module-system/physical-system-biz/src/main/java/org/jeecg/modules/database/entity/Experiment.java
index 40d7d30..40f4573 100644
--- a/physical-module-system/physical-system-biz/src/main/java/org/jeecg/modules/database/entity/Experiment.java
+++ b/physical-module-system/physical-system-biz/src/main/java/org/jeecg/modules/database/entity/Experiment.java
@@ -158,7 +158,7 @@ public class Experiment implements Serializable {
      */
     @Excel(name = "复制次数", width = 15)
     @Schema(description = "复制次数")
-    private Integer copyCount = 0;
+    private Integer copyCount;
 
     public void addCopyCount() {
         if (Objects.isNull(copyCount)) {