Index: ssts-tousse/src/main/java/com/forgon/disinfectsystem/tousse/toussedefinition/service/TousseInstanceManagerImpl.java
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diff -u -r33339 -r33443
--- ssts-tousse/src/main/java/com/forgon/disinfectsystem/tousse/toussedefinition/service/TousseInstanceManagerImpl.java	(.../TousseInstanceManagerImpl.java)	(revision 33339)
+++ ssts-tousse/src/main/java/com/forgon/disinfectsystem/tousse/toussedefinition/service/TousseInstanceManagerImpl.java	(.../TousseInstanceManagerImpl.java)	(revision 33443)
@@ -5224,7 +5224,7 @@
     					isSuccess = true;
     					tIInfoJSONArray.add(TousseInstanceUtils.tousseInstance2JsonString(dateFormat, dateFormat2, ti));
     					signRecordId = ti.getSignRecordId();
-    					if(signRecord == null){
+    					if(signRecord == null && DatabaseUtil.isPoIdValid(signRecordId)){
     						signRecord = (SignRecord) objectDao.getById(SignRecord.class.getSimpleName(), signRecordId);
     					}
     					if(TousseDefinition.canAddDepartmentStock(td)){