Default value in manage project resources screen

Summary:

When we add resource in Manage Project Resource screen, the project role defaults to Team member, how can we change this?

Business wants it to keep as blank so that Manager can assign the role accordingly

Content (please ensure you mask any confidential information):

Defaulting of Project Role to Blank while adding resources in manage project resources' screen/ If feasible?

Version (include the version you are using, if applicable):

26A

Code Snippet (add any code snippets that support your topic, if applicable):