@Bimlakar Singh 

then you can include the custom table record sysId in URL parameter and use onLoad catalog client script to get that and store in some hidden variable

Once RITM is submitted pick the value from hidden variable and set the parent field

something like this to pass and get url parameter value

Redirect from a UI Action to a Catalog Item and set default values 

If my response helped please mark it correct and close the thread so that it benefits future readers.