I'm trying to create an automation for the following scenario, but I'm stuck and need help.
Step 1: tickets are assigned a numeric "master priority" (custom field)
- Ticket A = master priority 1
- Ticket B = master priority 2
- Ticket C = master priority 3
Step 2 - Ticket D is assigned master priority 1, and the other tickets automatically bump down as follows:
- Ticket D = master priority 1
- Ticket A = master priority 1 -> 2
- Ticket B = master priority 2 -> 3
- Ticket C = master priority 3 -> 4

I tried the automation above, but it only bumps down Ticket A and not the others. The result looks like this:
- Ticket D = master priority 1
- Ticket A = master priority 2
- Ticket B = master priority 2
- Ticket C = master priority 3
I also tried using a "lookup issues" action, but it didn't work at all.

Help!