New version: Error when create a version with custom field of "File" type

[MorrisAsic]

Hi, congratulations for your incredible plugin!

I have follow issue:

Following this path: Open existing issue -> Edit -> Target Version -> Create new one with green button.

I have a "File" custom field that is not required but when i try to save version after enter the name, the system say me that the custom field is not valid. I try to delete it and create another one but i obtain the same error ( only with "File" custom field ).

System informations:

Environment: Redmine version 5.1.0.stable Ruby version 3.0.2-p107 (2021-07-07) [x86_64-linux-gnu] Rails version 6.1.7.6 Environment production

SCM: Mercurial 6.1.1 Git 2.34.1 Filesystem Redmine plugins: redmine_dmsf 3.1.3