Sticky dhcp client

Is it possible to remove entries from the Client List table?
I have a MAX HD4 and the offline clients still appear in the binding table and new clients can´t connect ( DHCP is full)
How can I realese the offline client?

Firmware 6.3.1 build 2256


As stated in that other post this is not possible currently. Those clients will drop off the list after their DHCP lease expires. I recommend shortening the lease time or go with a larger subnet on the LAN side. Thanks.