This is 802.11v refusing the association (therefore, trying to get the client to try another AP as its current utilisation is too high). If you have your WLAN designed correctly, the client should be able to find another AP to associate, so it shouldn't be a problem. 802.11v is great, and you should use it as it'll try to balance out your clients, and your clients will use the info to choose the best (rather than the loudest) AP to connect to. The issue you'll have with 802.11v is when it's used without a good WLAN design. I design with at least 3 APs at any time for a client to use, especially if it's a Wi-Fi-first environment with many users trying to use real-time applications. This is even more important if you have QoS enabled, as you restrict the available contention window. For instance, Cisco recommends only having 12 active voice clients per channel.
... View more