Create a workflow in sharepoint list

I have a list in the sharepoint.

I would like to create an workflow to fill in a specific column based on the date of other column.

For instance: I place manually a date in "column 1" , and the system should place a date in "column 2" . The date of column 2 is the date from column 1 + 30 days. 

I created:  

1. When an item is created or modified;
2. Condition:  "column 1" is not equal to null
3. If yes:  addDays(triggerOutputs()?['body/Final do Lote'], 30)

Appear an error saying: this workflow may result in an infinitive trigger loop.

How can I define it ?