I have created a workflow in Jira named "Document." Additionally, I have created a custom filed as "Numerical Number." I am attempting to set up an automation where the "Numerical Number" field starts with an initial value of 10029. This field is intended to function as a counter. Whenever a new document issue is created, the "Numerical Number" field should increase by 1 and become 10030. It should then continue incrementing as 10031, 10032, and so on. Please provide the simplest method to achieve this in Jira Cloud.