Problem in binding mac-address

Problem

We are unable to mac-bind IPs on the AC6005-8 wireless controller. Following error is prompted every time we try to do the same:
“Error: The static-MAC is existed in this IP-pool”.

While there is no same mac-address entry in the pool. Screenshots are attached for reference.

mac address : e4f8-9cb9-ef7e

Analysis

We need to check the output of this command

display ip pool name VLAN603-IP-Pool used

display ip pool name VLAN603-IP-Pool conflict

display ip pool name VLAN603-IP-Pool expired

display ip pool name VLAN603-IP-Pool All

Route cause

The MAC address is already binding on another IP.

Solution

1. Switch off the machine which has this mac address e4f8-9cb9-ef7e and back it to normal after finished all steps

2. Reset the DHCP session to this ip by below command  10.60.3.140

   <Huawei>reset ip pool name VLAN603-IP-Pool 10.60.3.140  10.60.3.140

3. Undo the command by below command under the pool

   [MAS-WLC-ip-pool-VLAN603-IP-Pool]undo static-bind ip-address 10.60.3.140 mac-address E4F8-9CB9-EF7E

4. Run your new IP binding under the pool

   [MAS-WLC-ip-pool-VLAN603-IP-Pool]static-bind ip-address 10.60.3.250 mac-address E4F8-9CB9-EF7E