Data Object Relation in Data Browser (Data Management) is not working properly

I am having a problem on referencing Schools table to SchoolTypes table.
Here is the SchoolTypes table data:</img>
And when I create a school, the “plus” button on schoolTypeIdFK is not showing.</img>
Thanks in advance!

It’s working now on Firefox browser. But don’t know why it doesn’t work earlier. Thanks!

“…button on schoolTypeIdFK is not showing.”
At first you should create row in Schools table and save it.
Console shows ‘plus’ button only for saved rows.

Yeah, thanks for pointing that out. I removed “not null” constraint on schoolTypeIdFK and saved it first. And now it started to work.