Re-Add a Node Error on OVO mgmt server

Problems:
If you want to add a node which has been added and deleted on that OVO management server, maybe you will encounter this kind of problem:
  OpC60-2010 Failed to create new Node: Object exists already.

Solution:
A) Possible "quick" solution.
# opcdbidx -dupl_check
# opcdbidx -dupl_fix

Quick because two commands are required. But may be slow to execute. Basically the opcdbidx should have solved.
If all fails then go to B). Make sure to have a backup, because you are deleting straight in Oracle.

B) Under the hood.
1. Delete the (old) node from the oracle db. Make sure you don't delete a valid node.
   #su - oracle
   $cd $ORACLE_HOME/bin
  
2) Run following sql statement to remove odd information of node.
./svrmgrl OR sqlplus "/ as sysdba"
SVRMGR>connect internal;

SQL Statements:
select * from opc_op.opc_node_names where node_name='fully qual name'; (get the node_id for that node and write it down)
delete from opc_op.opc_nodes where node_id='node_id';
delete from opc_op.opc_nodes_in_group where node_id='node_id';
delete from opc_op.opc_layout_nodes where node_id='node_id';
delete from opc_op.opc_node_config where node_id='node_id';
delete from opc_op.opc_node_names where node_name='fully qual name';
delete from opc_act_messages where node_id="node_id";
delete from opc_hist_messages where node_id="node_id";
exit;