How do I create multiple relationship paths between 2 tables?

Hi everyone, 

I'm trying to connect 3 tables together and came across the error that I can't create the relationship between table 1 & table 3  because it would create ambiguity between table 1 & table 2. 

It seems to be the same as this problem:

https://community.powerbi.com/t5/Desktop/Date-Table-relationship-with-multiple-tables/m-p/584417#M276838

but i'm still not sure on how to go about fixing it. 

Here is the file for reference: link.

Thank you!