Can't find "Field to Modify"

I have a database with a data type “Task” as well as a data type “Priority”. The Priority data type can be referenced by a Task, but I’m having trouble referencing the “Task’s Priority” field when creating this search box. The parent group’s data type is “Task”, and the search box is calling the data type “Priority” for the search, but the Field to Modify field should call for the “Task’s Priority”.

Instead, it doesn’t allow any options and only allows me to create a new field. Anyone have any suggestions?? Thanks in advance!

I have the same issue, did you got any solution?