Sprint custom field not getting exported during a JSW project migration

Issue Summary

During the migration of a JSW project migration there was an error in JCMA error logs related to sprint custom field export while exporting an issue which failed other dependencies. 

Steps to Reproduce

1. One the custom field screen by opening this URL. http://<SERVER_HOSTNAME>/jira/secure/admin/ViewCustomFields.jspa
2. Search for Sprint custom field. 
3. Select the Actions Gear for Sprint custom field and select Screens
4. Search for the following two Screens
   1. <PROJECT_NAME>: Scrum Bug Screen
   2. <PROJECT_NAME>: Scrum Default Issue Screen
5. Uncheck the check box against the two screens searched.

Expected Results

Project should get migrated successfully. 

Actual Results

The below exception is thrown in the JCMA error log file:

2021-10-25 21:05:30.678 ERROR <PROJECT_NAME> project-import We couldn't import Issue <ISSUE_ID> because of 1 missing dependencies: Custom Field 'Sprint'. This caused <X> other items to fail. Check the reasons for the missing dependencies on your server site.  

Workaround

Selecting the checkbox mentioned above against the two screens for a project will remove the issue and project export will succeed. 

1. <PROJECT_NAME>: Scrum Bug Screen
2. <PROJECT_NAME>: Scrum Default Issue Screen