Issue Summary

Using the Jira External System importer and trying to update issue with JSON file which has the same External Issue Id as currently set on the issue would result into an error "External issue <id> already exists as <issue-key> not importing." and issue won't be updated.

Steps to Reproduce

1. Do a json migration (attached json)
2. Retrigger same migration with updated info 

Expected Results

issues should get updated 

Actual Results

The below exception is thrown 

When trying to reimport the comments for the ticket which has External Issue ID field populated with exactly the same id importer won't process this issue with error "External issue <someid> already exists as <issue-key> not importing." 

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available