Redis [BUG] ZADD LT with INCR will reply with the INCR number but actual score doesn't change

Describe the bug

If you have an entry in a sorted set, using LT with INCR to a positive number should not INCR the number (same with GT and negative). However, the 'reply' does indeed show the increased number (unexpected). Though, the actual score does not change (which is expected)

To reproduce

127.0.0.1:6379> zadd x 1 a
(integer) 1
127.0.0.1:6379> zadd x LT 2 a
(integer) 0
127.0.0.1:6379> zrange x 0 -1 withscores
1) "a"
2) "1"
127.0.0.1:6379> zadd x LT incr 1 a
"2"
127.0.0.1:6379> zrange x 0 -1 withscores
1) "a"
2) "1"

Expected behavior

zadd x LT incr 1 a should result:

"1"

Any additional information that is relevant to the problem.