Exception in thread "main" java.lang.ClassCastException: class org.xbill.DNS.RRSIGRecord cannot be cast to class org.xbill.DNS.SOARecord (org.xbill.DNS.RRSIGRecord and org.xbill.DNS.SOARecord are in unnamed module of loader 'app')
	at org.xbill.DNS.Zone.lambda$addRecord$1(Zone.java:259)
	at org.xbill.DNS.Zone.withWriteLock(Zone.java:436)
	at org.xbill.DNS.Zone.addRecord(Zone.java:248)
	at org.xbill.DNS.Zone.maybeAddRecord(Zone.java:181)
	at org.xbill.DNS.Zone.<init>(Zone.java:115)
	at axfr.App.main(App.java:58)