上链bug修复

@@ -379,6 +379,10 @@ public class ProductChainService {
                 .source(item.getSource())
                 .build();
         try {
+            if (StringUtils.isNotEmpty(item.getLastTransactionId())) {
+                build.setLast_transaction_id(item.getLastTransactionId());
+            }
+
             Map describe = BeanUtils.describe(build);
             describe.put("id", item.getId());
             aSynPostChainInfo(describe, item.getId(), item.getSign());