Why is my data labeled as obsolete in Explore?

Question 

Why do some metrics or attributes appear as "Obsolete"?

Answer 

If a metric or attribute is marked as obsolete, it means that they are an old version of the data. Don't use data marked as obsolete because it can cause issues and discrepancies in your reports.

Instead, search for the equivalent metric or attribute that isn't labeled as obsolete and that belongs to any of the current datasets. For example, if your report includes the attribute Obsolete - Ticket tags, replace it with Ticket tags available in the Tickets dataset.