I am trying to create a Manual Automation Rule that would set the Baseline Dates to match Target Dates.
- IF Baseline Dates are empty
- AND Target Dates are populated
- THEN set Baseline Dates to match Target Dates
- SO:
- Baseline start date = Target start
- Baseline end date = Target end
My Rule:

However, I get an Error editing issues
DTO-11807 (Error parsing date string: (customfield_16818))
I also tried just using the following in place of the "More Options".

The Audit Log shows it was successful, but the field did not update.
I think my error is in the JSON, but could be wrong. I have tried the following in "More Options":
"customfield_16818": "{{issue.Target start.startDate.jiraDate}}"
"Baseline start date": "{{issue.Target start.startDate.jiraDate}}"
"customfield_16818": "{{issue.Target start.startDate.jiraDate}}"
"Baseline start date": "{{issue.customfield_10103.startDate.jiraDate}}"
Thank you in advance for your help!