move 移动键到另外的库,目标库与移动的键，有相同键名则失败

127.0.0.1:6379> set test 123
OK
127.0.0.1:6379> move test 1
(integer) 1
127.0.0.1:6379> keys *
(empty list or set)

127.0.0.1:6379> select 1
OK
127.0.0.1:6379[1]> keys *
1) "ad"
2) "test"
3) "adfsd"
# 目标库与移动的键，有同名则失败
127.0.0.1:6379> keys *
(empty list or set)
127.0.0.1:6379> set test 123
OK
127.0.0.1:6379> keys *
1) "test"
127.0.0.1:6379> move test 1
(integer) 0

127.0.0.1:6379> select 1
OK
127.0.0.1:6379[1]> keys *
1) "ad"
2) "test"
3) "adfsd"