This site uses different types of cookies, including analytics and functional cookies (its own and from other sites). To change your cookie settings or find out more, click here. If you continue browsing our website, you accept these cookies.
Add the same "Missing" field behavior (selected and in yellow color) in Select or Join tools for Find Replace and Unique tools as well. This way, I would keep track of the fields used in either tool configuration without having to guess them.
Attached a self-explanatory workflow as an example.