systemd-networkd: br0: DHCP6 CLIENT: Failed to set identifier: Invalid argument

Feb 22 05:31:56 localhost systemd[1]: Starting Network Configuration...
░░ Subject: A start job for unit systemd-networkd.service has begun execution
░░ Defined-By: systemd
░░ Support: https://gentoo.org/support/
░░ 
░░ A start job for unit systemd-networkd.service has begun execution.
░░ 
░░ The job identifier is 450.
Feb 22 05:31:56 localhost systemd-networkd[2510]: br0: netdev ready
Feb 22 05:31:56 localhost systemd-networkd[2510]: enp6s0: Link UP
Feb 22 05:31:56 localhost systemd-networkd[2510]: enp5s0: Link UP
Feb 22 05:31:56 localhost systemd-networkd[2510]: enp4s0: Link UP
Feb 22 05:31:56 localhost systemd-networkd[2510]: enp3s0: Link UP
Feb 22 05:31:56 localhost systemd-networkd[2510]: enp2s0: Link UP
Feb 22 05:31:56 localhost systemd-networkd[2510]: enp1s0: Link UP
Feb 22 05:31:56 localhost systemd-networkd[2510]: enp1s0: Gained carrier
Feb 22 05:31:56 localhost systemd-networkd[2510]: lo: Link UP
Feb 22 05:31:56 localhost systemd-networkd[2510]: lo: Gained carrier
Feb 22 05:31:56 localhost systemd-networkd[2510]: Enumeration completed
Feb 22 05:31:56 localhost systemd[1]: Started Network Configuration.
░░ Subject: A start job for unit systemd-networkd.service has finished successfully
░░ Defined-By: systemd
░░ Support: https://gentoo.org/support/
░░ 
░░ A start job for unit systemd-networkd.service has finished successfully.
░░ 
░░ The job identifier is 450.
Feb 22 05:31:56 localhost systemd-networkd[2510]: br0: netdev exists, using existing without changing its parameters
Feb 22 05:31:56 localhost systemd-networkd[2510]: br0: DHCP6 CLIENT: Failed to set identifier: Invalid argument
Feb 22 05:31:56 localhost systemd-networkd[2510]: br0: Failed