Hi! Please I need help understanding how to filter linked records when populating a record in a table. I have a table with some groups of professionals, like Group 1, Group 2 and so on. In another table, I have some themes, which will be the subject of some classes. In the class table, I would like to allocate at a specific date and time, a group and specify the topic that will be presented to them. I would like to present as options only the groups that have not yet had all the themes. And, after choosing the group, present only the themes that the chosen group has not yet had. How can I provide this kind of filter using linked records? Thank you very much in advance.