Enable Masked Joins
While masked joins are allowed, only project owners can add data sources to the project. Additionally, masked columns can only be joined if they are masked using hashing.
In order to join mask columns across data sources, those data sources must be linked by a project.
Requirement: You must own the project
Create a project or select an existing project.
Navigate to the Overview tab.
Click the Allow Masked Joins toggle.
Click Confirm.