Redmine

When copying a project that includes versions, the versions themselves are copied, but any values entered in the custom fields for those versions are not.

Steps to Reproduce:

1. Go to "Custom fields » Versions » New custom field" and create a custom field (e.g., text format) for versions.
2. Create a version for a project.
3. Enter a value in the custom field for the version and save it.
4. Navigate to "Administration > Projects" and click "Copy" in the "Action" column for the project. In the "New project" screen, select "Versions (N) and Files" to include versions in the copy.
5. While the version itself is copied, the custom field values entered for the original version are not copied.

Redmine Infomation:

https://svn.redmine.org/redmine/trunk@23140

Environment:
  Redmine version                5.1.3.devel
  Ruby version                   3.2.5-p208 (2024-07-26) [aarch64-linux]
  Rails version                  7.2.1.1
  Environment                    development
  Database adapter               PostgreSQL
  Mailer queue                   ActiveJob::QueueAdapters::AsyncAdapter
  Mailer delivery                smtp
Redmine settings:
  Redmine theme                  Default
SCM:
  Subversion                     1.14.2
  Mercurial                      6.3.2
  Bazaar                         3.3.2
  Git                            2.46.1
  Filesystem                     
Redmine plugins:
  no plugin installed