How to sync the Jira issues after  adding new custom fields to the script. 

Source : Jira Cloud

Destination : Jira Server

Steps :

1. First Sync : Use triggers to sync the project without custom fields in the script
2. Add 2-3 custom fields to the script(Outgoing and incoming)
3. Use Triggers again to sync the project

Custom fields are not getting pulled from Jira Cloud to Jira server. How do we get the custom fields data without unexalting the issue after first sync?