When creating an issue, you can link it to another issue with the same subject. The new issue is separate from the linked issue, so any changes to the linked issue will not affect the other issue.
The issue number of the linked issue is included in the new issue number. For example, if the linked issue number is 125, the new issue number would be 125-[the next available issue number].
Note Once you’ve linked two issues, they cannot be unlinked.