Missing issue type
An issue does not get synchronized and an error appears in the troubleshooting section with the category Incoming Issue error and a message such as There is no issue type mapping defined for id: 10021.
A possible cause for this problem is that an issue type which is configured in Issue Types section has been deleted from one of the Jira instances.
- Clear Backbone cache in order to see which issue type mapping is incorrect.
- Try to fix the problem by changing / replacing the issue type configuration which is linked to the deleted Issue Type.