Synchronizing Projects Already Containing Issues
When synchronizing existing projects, Backbone will synchronize all existing work items (that meet the rules you set in your configuration) in both projects over to the partner project.
Configuration Tips & Best Practices
When synchronizing existing projects:
You need to manually configure the projects in Jira. Backbone will synchronize work items , but not your projects' Jira configurations
Please be aware that the work items keys may not be the same in both projects
We recommend to have different project keys for the two synchronized projects, to avoid confusing your Jira users