Clash Resolve Counter Increasing

[Tim Harman <tim@muppetz.com>]

Hi,

How can I debug what's causing this ever increasing number of 
clash_resolve counters on my router?

user@host# sudo conntrack -S
cpu=0           found=11145 invalid=48749 insert=0 insert_failed=1691 
drop=1691 early_drop=0 error=1792 search_restart=0 clash_resolve=901502 
chaintoolong=0
cpu=1           found=10492 invalid=48616 insert=0 insert_failed=1748 
drop=1748 early_drop=0 error=1422 search_restart=0 clash_resolve=907423 
chaintoolong=0

This is on a router with a pretty basic NAT setup - NAT anything on the 
LAN (192.168.0.0/16) to a single WAN IP address.  Two Interfaces, eth0 
(WAN) and eth1 (LAN)

The same output a minute later:

tim@ferrari# sudo conntrack -S
cpu=0           found=11150 invalid=48766 insert=0 insert_failed=1691 
drop=1691 early_drop=0 error=1792 search_restart=0 clash_resolve=901897 
chaintoolong=0
cpu=1           found=10497 invalid=48631 insert=0 insert_failed=1748 
drop=1748 early_drop=0 error=1422 search_restart=0 clash_resolve=907859 
chaintoolong=0

So ~300 clash_resolve's a minute.

Kernel 6.6.30

Is there some way I can debug what's triggering the clashes?

Many Thanks,
Tim