Create a child incident links two or more incidents between each other in a "parent-child" model. To create a child ticket, please complete the following steps:
Start creating a new incident in a way as it was described here;
Fill in the form, then scroll down the page and press the Related Records tab;
Unlock Slave Incidents. For this, press a lock icon.
Press a magnifier icon to select an incident that will be a parent for this one. You can choose over one incident, in this case, all of them will be a parent for it.
Press the lock icon again and then press Save.
If you need to make an existing incident child for another one, then you can skip step 1.