Every 1-to-many link in data table is marked as many-to-many, also cannot create rollup

Bugs
1

The collections in our data tables are incorrectly marked as many-to-many and the switch controlling this is disabled saying that there are rollups associated with the link. This is a bug, there are no rollups associated with these links. Furthermore, we are unable to create any rollups of our own with these collections, there are no tables listed when we go to create a rollup.

We have been successful as asking Nola to create rollup links and this is the only way we can create them at the moment.

2

I have the same issue. I found a workaround besides Nola.
When you are on a table in the Data tab, click on “New field”, choose a random ex. Duration. In the popup window in the “choose a field type” dropdown, then you can select lookup, rollup etc. and connect to the other tables.