A useful starting point
In a practice exercise, say which card the joker represents. Compare the group before and after the change. Consult your variant’s instructions if the role of a selected wild card is unclear.
Try it in practice
Move the joker to another possible group and inspect the entire layout again. A change that helps one group can affect another requirement. Keep the exercise slow and visible.
Take one idea forward
Choose one question to revisit next time. Use the current rules for your format and keep the session comfortable for everyone.