How to add WTPart as a child to Parent part in Part Structure Browser without iterating parent part

I have a requirement where if I add a specific type of WTPart to existing Part in Part structure using OOTB actions "add existing"/"add new", the Parent part to which I want to add child part should not iterate.  For this I have implemented listener and catch the PRE_STORE event and could found the target object which is WTPartUsageLink. From this I got both  roleA and roleB objects, and then I undo check out the roleA (parent) and then created an usagelink and finally tried to save it using PersistenceHelper.manager.insert() API

Here the issue is probably in back end after PRE_STORE , there is PRE_CHECKIN event that might be calling so I am getting exception that unable to find the checked-out copy. Here there will not be any working copy because I undo check out it using WorkInHelper.. API. 

My overall intension is that parent part should not iterate but need to create usagelink by adding a  child part (of specific type).

Note: This I need only when I am trying to add a specific type of part which will not involve any release. I have an option in my mind of creating custom action followed by implementing custom Form Processor, however, I want to know the feasibility of using existing OOTB actions by implementing listeners.

Can anyone help me out for this? Thanks in advance