diff --git a/docs/operations/decommission.md b/docs/operations/decommission.md
index 76563a9..045bd4c 100644
--- a/docs/operations/decommission.md
+++ b/docs/operations/decommission.md
@@ -10,4 +10,12 @@ This is an overview of the needed tasks to perform when we want to remove a node
   * Remove it from Ansible inventory (and search for references for that node in case of)
   * Remove it from Zabbix monitoring
 
+Worth knowing that if node is used in one of the following roles, it needs to be also removed from the sqlite DB used to generate the dynamic powerdns setup.
 
+```
+host="centost8.centos.org"
+pushd /var/lib/centos-infra/
+echo "delete from nodes where fqdn='${host}';" | sqlite3 nodes.db
+./gen_backend
+popd
+```