Hello. I'm trying to add bind9 to our two-node ISPConfig3 install. Originally, I installed the system without bind9 (just skipped its install from "the perfect server" guide, just like webmail). Now, I tried installing it on both nodes, but seems something is still not good. On the first node, I had to delete /etc/bind/named.conf.local or ISPC wouldn't overwrite it. But I find no way to have the second server host the same zone as slave. I already tried re-running "ispconfig_update.sh --force" (already at the latest release on updated Debian10 system), creating /etc/bind/slave/ on the second server (the slave one) and remove named.conf.local on the second server too. I also tried deleting and recreating the slave zone but nothing changed. Surely I'm missing something. What should I do to make it work as expected? Tks.