Modelling Issue - Tables Created for Filters not connecting

Hi Power BI

I have an issue with my slicers for my visuals.

For my dashboard to work correctly (and relationships to work) I had to build three slicer tables (Division, Branch, Section).

However when I diddone this, my slicers wont connect between eachother. For example, when a Division is selected from a slicer, I should only be able to see the Branches and Sections that connect to that Division.  

Example of Table built for filters

= Table.Group(#"Promoted Headers", {"Branch"}, {{"Count", each Table.RowCount(_), Int64.Type}})

When I try to fix the relationship I recieve the following error. I cant remove the connections between my other tables as I had to set this up initially for everything to work in the first place. 

Please help