[FEATURE] 未知异常:java.lang.ClassCastException: com.alibaba.fastjson.JSONObject cannot be cast to com.nc.statistics.dto.response.CarStatisticalDTO

springcloudalibaba, java8,redis3；

redis中的旧数据
{
"@type": "com.nc.statistics.dto.response.CarStatisticalDTO",
"abnormalTypeName": false,
"accountBalance": false
}；

fastjson1.2.83 升级到 fastjson2.0.61后，
直接替换为 fastjson-2.0.61.jar，fastjson2-2.0.61.jar，fastjson2-extension-2.0.61.jar

接口取redis中的旧数据，提示未知异常:java.lang.ClassCastException: com.alibaba.fastjson.JSONObject cannot be cast to com.nc.statistics.dto.response.CarStatisticalDTO；
请问有什么方式，可以兼容这种旧数据。

Reproduce the failure using the listed Java 8, Redis 3, fastjson 1.2.83/2.0.61 versions and the supplied legacy JSON. Start by tracing how fastjson2 reads the Redis value and handles the @type field, then compare the resulting object with CarStatisticalDTO. Done means the compatibility behavior for this old record is verified and either supported by a test or clearly documented.

Written by the indexing model from the issue text.