I was testing creating onboard and frequency modules. I selected the module type On-Boarding which was created successfully, but when I tried to add a Frequency Module I got the error in the attached image.

p.s. I realize when choosing a module type to add that there's a message saying "Only one allowed per project" but I believe this means we can only have 1 onboard module and 1 frequency module.. etc., not only 1 module type. If so, maybe we can change the message to be like "Only one module per module type allowed per project" or "Only one module allowed per module type"