Issue Summary

Jira projects with an underscore in the project key may be migrated with Jira Cloud to Cloud migration

Steps to Reproduce

Jira Server/DC

1. Login as Jira adminstrator.
2. In the navigation bar, go to Settings > System.
3. In the left navigation pane, ensure “General Configuration” is selected, then click on Advanced Settings.
4. Edit jira.projectkey.pattern to ([A-Z][A-Z_0-9]+) - noting the addition of an underscore.
5. Create a new project key with an underscore character, for example, _U_S, U_S1 or UNDER_SCOR.
6. Populate the recently created projects with some issue data.
7. Use JCMA to migrate a project with an underscore in the project key.
8. Jira Cloud Migration Assistant will migrate the project

Jira Cloud

1. Use the Jira Cloud to Cloud migration tool to migrate projects

Expected Results

Project keys with underscores should not be migrated using Jira Cloud to Cloud migration tool, as they are an invalid project key in Jira Cloud.

Actual Results

Project keys with underscores are migrated using Jira Cloud to Cloud migration tool.

This causes downstream issues, for example, Jira smart links in Confluence do not render. They state "Can't find link".
Also, issues cannot be seen in the new issue view

Workaround

• Change the project key in the project in cloud to remove the underscore from the project key prior to migration.