Can't see inline column list when trying to do a lookup

I have a relation column in users table that relates subscriptions. In the subscription table, there is a relation column that relates subscription plans. I am trying to do a lookup in users table which will pull user_limit which is a column in subscription plans. Lookup - relation to subscription - relation to plan - user-limit. The columns list in Relation to Plan (subscription plans) does not show.

Assuming ā€˜Relation to plan’ is a SINLGLE relation add a lookup colum to you subscription table via ā€˜relation to plan’ and select the column you want to bring in.

Now when you go through the ā€˜relation to subscription’ list you should see the new look up column.

That worked nicely. Thanks a lot.