This permission was wrongly used to allow bulk issue copy. To prevent user from moving an issue to another project, the project field should now be set to read-only in the workflow permissions. A migration does this automatically for roles that have the edit_issues permission without having the move_issues permission.
Related issues
Defect #18855: User with only Move Issue rights in the project can still create issues using mass copy!
Added by Jean-Philippe Lang over 10 years ago
Removed :move_issues permission (#18855).
This permission was wrongly used to allow bulk issue copy. To prevent user from moving an issue to another project, the project field should now be set to read-only in the workflow permissions. A migration does this automatically for roles that have the edit_issues permission without having the move_issues permission.