UI field not letting me added it to a table

I’m am trying to adding a UI only field to a table (see screenshot) the model is an aggregate model and the formula is {{talkdesk__Talk_Time_sec__c}}/60

The field want let me add it to the table please help.

Hello Anwaozo -

Unfortunately, this is a known issue.  See http://community.skuid.com/skuid/topics/unable-to-add-ui-only-from-aggregate-model-to-table-and-fie… for more details.

The workaround is to drag the field from the Model Fields list directly or edit the XML manually.

Hope this helps!