Another fix

src/libknot/nameserver/name-server.c

@@ -2713,8 +2713,9 @@ static int knot_ns_replace_nsid(knot_opt_rr_t *opt_rr, const char *nsid,
 	while (i < opt_rr->option_count && !found) {
 		if (opt_rr->options[i].code == EDNS_OPTION_NSID) {
 			found = 1;
+		} else {
+			++i;
 		}
-		++i;
 	}
 
 	if (found) {