Unfortunately no, it can’t be stopped on any version of AllStar. The best you could do is log to a file. But that would also log other messages you want to see on the console.
This is a side effect of Round Robin DNS. There are currently 5 servers in RRDNS. Every time your node queries DNS it will get the next server. The reason is for load balancing, see https://grafana.allstarlink.org, the upper right pie chart shows the registration load.
I’ve build an alternate registration method using http. It’s under very limited Alpha testing. If anyone would like to test it, please send me a PM. The install requires comfort at the Linux command line.