Set Date with Automation

AB_vnzxo4

Background:

I am trying to set up an automation so that when a ticket is transitioned from a todo state to an in progress state the current date is set in a custom date picker field called Start date.

When setting this up I have the trigger as a transition and the action set up as an edit issue. I have set the Start date field to be set as {{now}} but it keeps getting errors when triggered. The error says that there is multiple fields with the same name. The other field is called "Start Date" and has a capital D. It is also not assigned to my field schema. 

Additionally the automation i use to set the due date when a ticket is transitioned from in progress to done is set up the same way and works.

How can I set this up so it can set the date when transitioned?

Edit Issue Config:

Error from audit log:

Marc -Devoteam-

Hi @AB 

This is an issue that I have experienced manier times.

Field names are stored with lower and upper case in the backend. So the error thrown is that Jira automation sees all field and doesn't look at the field schemes.

Having multiple fields with the samen name should also be avoided, as this causes strange issues, like the current one.

If you don't want to change the other Start Date field, you could use advanced options to set the start date.

Use the more options setting and add, you will need to find the custom field Id of your start date field, as the one mentioned below is an example

{
   "fields": {
        "customfield_10407": "{{now}}"
                  }
}