Cql NoHostAvailable：更新数据时出错

Question

假设我有一个如下表

<ScrollView contentInsetAdjustmentBehavior="automatic">
  <SafeAreaView>
        {/* long content here */}
  </SafeAreaView>
</ScrollView>

当我这样做

branch | uniqueid   | communication | firstname | isksfeemp | isobsolete | lastname | mobile     | official     | permanent | residential | temporary
--------+------------+---------------+-----------+-----------+------------+----------+------------+--------------+-----------+-------------+-----------
   Koch |          1 |         demo2 |      null |      null |       null |     null |       null |         null |      null |        null |      null
  Kochi |          1 |         demo1 |      Aqib |         0 |          0 |    Saman | 8129883833 | demoofficial |      demo |     demores |  demotemp
  Kochi |         12 |          demo |      Aqib |         0 |          0 |    Saman | 8129883833 | demoofficial |      demo |     demores |  demotemp
  Kochi |    1211111 |          demo |      Aqib |         0 |          0 |    Saman | 8129883833 | demoofficial |      demo |     demores |  demotemp
  Kochi | 1211111111 |          demo |      Aqib |         0 |          0 |    Saman | 8129883833 | demoofficial |      demo |     demores |  demotemp

我遇到了类似update customer set communication='demo4' where uniqueid=1 and branch='Kochi' IF EXISTS;

的错误

我的键空间配置是

NoHostAvailable:

我可以帮助任何人，这将是非常可观的。我认为问题出在复制因素或策略周围。