Why is this network interface bing renamed?

[rsteinmetz70112]

I found this in the logs

syslog.1:May 25 07:35:02 thelma kernel: [    1.242706] alx 0000:01:00.0 enp1s0: renamed from eth1
syslog.1:May 25 07:35:02 thelma kernel: [   23.984637] alx 0000:01:00.0 enp1s0: NIC Up: 1 Gbps Full

There is a legacy definition for some interfaces in /etc/udev/rules.d/70-persistent-net.rules
But none apply to this particular interface.

# This file maintains persistent names for network interfaces.
# See udev(7) for syntax.
#
# Entries are automatically added by the 75-persistent-net-generator.rules
# file; however you are also free to add your own entries.

# Converted from /etc/iftab on upgrade
SUBSYSTEM=="net", DRIVERS=="?*", ATTR{address}=="00:15:58:1e:f7:f4", ATTR{type}=="1", NAME="eth0"


# PCI device 0x10ec:/sys/devices/pci0000:00/0000:00:10.0/0000:04:08.0 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:e0:4c:23:2f:4f", ATTR{dev_id}==
"0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

There are two network interfaces.

01:00.0 Ethernet controller: Qualcomm Atheros QCA8171 Gigabit Ethernet (rev 10)
02:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8169 PCI Gigabit Ethernet Controller (rev 10)

[Doug S]

Things switched to Predicable Interface Names a few years ago. (if you don't like the reference I gave, just use the search term "Linux Predicable Interface Names" on a search engine for tons of links.)

[rsteinmetz70112]

I'm aware of that change. I am asking why this particular obsolete interface persists even now.