Few days ago, we created a new CRM (2013) server with few organisation. Now we want to make older and newly created organisation in sync. Thus, I created a un-managed solution and tried to import it in newly created org, but it failed with following error (ref below screen shot)
I thought, it could be version issue, but when I compared build version of both the organisation, but surprisingly, both organisations build was same.
Thus, I checked in CRM organisation in setting >> Administration >> Product updates
and i found the on one organisation update were updated but not on another, ref below images
we needs to update the organisation by clicking on update button, after successful installation CRM will show fallowing window
It resolved my problem.
Hope it will helps someone.