Redis Wrongtype Operation against a key holding the wrong kind of Value_redis

Redis.clients.jedis.exceptions.JedisDataException:WRONGTYPE Operation against a key holding the wrong kind of value

Today to change the code, a run ran wrong, the wrong reason:

Because the same key already exists in the Redis, and the value type of the key is not set, it is Sortset (before the change), and the error is thrown when the smembers is invoked.

Workaround:

The original Sortset type key to Del, and then the new execution code, no problem.

It seems to change the cache type in the future, to a long mind, first of the same name different types of key to Del off.