Assume that you try to update data in the Excel Add-in for Master Data Services (MDS) in SQL Server 2017. After updating when you click on Refresh, you may notice that the gray background for read-only attributes disappears.
This issue is fixed in the following cumulative update for SQL Server:
About cumulative updates for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server: