70-persistent-net.rules not being honoured

This is a PXE-install, which has previously been 14.04. I'm moving it to 18.04, and most things are OK, but for some reason, only one of the rules in /etc/udev/rules.d/70-persistent-net.rules (automatically generated by the preseed script) is being honoured.

/etc/udev/rules.d/70-persistent-net.rules:

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="40:8d:5c:5c:df:ce", ATTR{dev_id}=="0x0", ATTR{type}=="1", NAME="ctrl1"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="68:05:ca:22:c6:0b", ATTR{dev_id}=="0x0", ATTR{type}=="1", NAME="data1"

/etc/network/interfaces:

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto ctrl1
iface ctrl1 inet dhcp
auto data1
iface data1 inet static address 10.255.01.13 netmask 255.255.255.240 network 10.255.01.0 broadcast 10.255.01.255

ifconfig output:

foo@bar:~# ifconfig
data1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet xx.xx.xx.xx netmask 255.255.255.240 broadcast 10.255.1.255 inet6 fe80::6a05:caff:fe22:c60b prefixlen 64 scopeid 0x20<link> ether 68:05:ca:22:c6:0b txqueuelen 1000 (Ethernet) RX packets 123 bytes 10749 (10.7 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 44 bytes 3772 (3.7 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 device interrupt 17 memory 0xdc040000-dc060000
enp0s31f6: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet xx.xx.xx.xx netmask 255.255.255.128 broadcast 192.168.166.255 inet6 fe80::428d:5cff:fe5c:dfce prefixlen 64 scopeid 0x20<link> ether 40:8d:5c:5c:df:ce txqueuelen 1000 (Ethernet) RX packets 966 bytes 89471 (89.4 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 701 bytes 391743 (391.7 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 device interrupt 16 memory 0xdc100000-dc120000
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1000 (Local Loopback) RX packets 697 bytes 57332 (57.3 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 697 bytes 57332 (57.3 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

data1 is OK, but ctrl1 is not being set.

Any ideas?

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