Bulk migrate did not migrate all issues

[Flo]

Followed steps as detailed here:

https://support.atlassian.com/jira-software-cloud/docs/migrate-between-next-gen-and-classic-projects/

500/700 issues migrated alright, but now stock with 200 issues in the old project

No issues appeared during migration, and when I retry the migration it just says completed successfully.

[Petter Gonçalves]

Hello @Flo

Welcome to Atlassian Community!

Please, provide us the following information so we can properly troubleshoot why these specific issues were not migrated to the Classic project:

1 - Is there anything specific about this issue that you can see in a first look? Do they have a different issue type, links or fields different from the others that were successfully migrated?

2 - Are those issues Epics or Sub-tasks?

3 - If you repeat the migration process, did they remain in the old project?

4 - Can you please provide us a screenshot of one of the issues that were not migrated?

Let us know if you have any other questions.