I am a grad student reviewing papers for a small workshop at an upcoming conference. I am fairly certain one of the papers assigned to me is written by my direct research mentor, with whom I'm doing an internship. The process is double-blind, but due to writing, style, topic, particular obscure citations, and other factors I'm fairly convinced of this.
Is there usually a mechanism for passing on the paper review due to a conflict of interest? Moreover, would that be the right decision here? I respect my mentor very much; he is a top researcher in the subfield the paper addresses. I am unsure if this constitutes a conflict of interest.
This is also my first time as a reviewer, so am not familiar with the guidelines/expectations for this process. Any help would be appreciated!