Redmine

Dear

I need help for the plugin that i can import on redmine. i need a plugin that facilitate the issues versions. like i have created an issue it will assign it 0.1 version. and we are three people working on the same issue. another user have seen my create issue he wants to update that, so the plugin create another version for him 0.2, if i am again want to update the same issue an another version will have to created there for me. at last if i want to delete some versions i can delete it. i will be waiting for your positive response here.

Regards:
Imran