Fix error on import

application/src/main/java/org/thingsboard/server/service/sync/ie/importing/impl/OtaPackageImportService.java

@@ -63,7 +63,7 @@ public class OtaPackageImportService extends BaseEntityImportService<OtaPackageI
     protected OtaPackage saveOrUpdate(EntitiesImportCtx ctx, OtaPackage otaPackage, OtaPackageExportData exportData, IdProvider idProvider, CompareResult compareResult) {
         if (otaPackage.hasUrl()) {
             OtaPackageInfo info = new OtaPackageInfo(otaPackage);
-            return (OtaPackage) otaPackageService.saveOtaPackageInfo(info, info.hasUrl());
+            return new OtaPackage(otaPackageService.saveOtaPackageInfo(info, info.hasUrl()));
         }
         return otaPackageService.saveOtaPackage(otaPackage);
     }

common/data/src/main/java/org/thingsboard/server/common/data/OtaPackage.java

@@ -47,4 +47,9 @@ public class OtaPackage extends OtaPackageInfo {
         this.data = otaPackage.getData();
     }
 
+    public OtaPackage(OtaPackageInfo otaPackageInfo) {
+        super(otaPackageInfo);
+        this.data = null;
+    }
+
 }