我正在尝试使用Dynamo查询aws-sdk。我可以用Partition Key查询with,但是当我尝试添加LSI时,我会得到ValidationException: Invalid KeyConditionExpression: Incorrectoperand type for operator or function; operator or function: begins_with, operand type: M错误,并且不确定如何修复它ExclusiveStartKey: lastEvaluatedKey,