Unlock a Version (Master Data Services)
Applies to: 
SQL Server - Windows only
Azure SQL Managed Instance
In Master Data Services, unlock a version of a model to enable changes to the model's members and their attributes.
Prerequisites
To perform this procedure:
You must have permission to access the Version Management functional area.
You must be a model administrator. For more information, see Administrators (Master Data Services).
The version's status must be Locked. For more information, see Lock a Version (Master Data Services).
You must have permission to access the Version Management functional area. For more information, see Functional Area Permissions (Master Data Services).
To unlock a version
In Master Data Manager, click Version Management.
On the Manage Versions page, select the row for the version you want to unlock.
Click Unlock.
In the confirmation dialog box, click OK.