Kea DHCPv4 not allocating IP address from reservations

[opnsenseuser1]

Hi,
I have updated Opnsense to 24.1.7
Migrated ISC DHCP4 to Kea DHCPv4.
All IP address allocations are working fine from reservations but except one.

Following is the WARN message I see in the log. It is a TP-Link switch model - TL-SG108E

WARN [kea-dhcp4.alloc-engine.0x83442fb00] ALLOC_ENGINE_V4_ALLOC_FAIL_CLASSES [hwtype=1 xx:xx:xx:xx:xx:xx], cid=[xx:xx:xx:xx:xx:xx:xx], tid=0x7518: Failed to allocate an IPv4 address for client with classes: ALL, VENDOR_CLASS_TL-SG108E, UNKNOWN