Hi, firstly thanks for your answers!Le me explain my point of view on this problem. Most easy way to realize possibility of join several tickets would be the following algorithm. For example we have 3 tickets and we need to close two of them, so I think need to automate the following steps that would be made when we close the tickets:1. Add links in open ticket on closed tickets with note about the reason for the closure.2. The link of the leaving open ticket (which we decided to leave open) need to place in closed tickets with aforementioned note.I hope you undestand my english.