# Altium Designer project version control

I am learning Altium Designer and I've controling the project with Arch Linux Subversion server. I've made some changes in the project's sheets and when I try to Commit Whole Project, I get following situation: Now, as we can see, there is unversioned 'PCB_Project1.Dat' file. Is this file mandatory for non-error project import from Subversion or it must be added to version control?