It seems like you have a misconfiguration. Try this
set forwarding-options dhcp-relay overrides set forwarding-options dhcp-relay relay-option set forwarding-options dhcp-relay forward-onlyset forwarding-options dhcp-relay server-group 4-srvs 1.1.1.1 set forwarding-options dhcp-relay server-group 4-srvs 1.1.1.2 set forwarding-options dhcp-relay server-group 4-srvs 1.1.1.3 set forwarding-options dhcp-relay server-group 4-srvs 1.1.1.4 set forwarding-options dhcp-relay group 4 active-server-group 4-srvs set forwarding-options dhcp-relay group 4 interface ae0.0 set forwarding-options dhcp-relay group 4 interface irb.10 set forwarding-options dhcp-relay group 4 interface irb.20 set forwarding-options dhcp-relay group 4 interface irb.30 set forwarding-options dhcp-relay group 4 interface irb.40 set forwarding-options dhcp-relay active-server-group 4-srvs