Multi-Select lookup field has reached its maximum??

Multi-Select lookup field has reached its maximum??

Hi there,

I want to create a multi-select lookup field in a module but I can't select the model I want the relationship to be with from the list. From the help page on this I see that you can only create a max of 2 relationships per module? Is that true? The one in question already has 2 relationships.

Can this be increased to 3 perhaps, or is this not possible at all?

Would need this to make my business process easiest!
Thanks for any help and advice!
S.