**Error: Please only select one column to be mapped to a column.**
When importing contacts, this message may appear on the mapping page. This is triggered when two separate data points are being imported to the same field.
For example: your spreadsheet has two points of contact for each record and you have two columns for the First Name and two columns for the Last Names.
In the screenshot above, you'll see that there are two drop downs that have the First Name field designated -- this is what triggered the error message.
To overcome this issue, select a different field to map to. In this example, we would recommend creating a New Custom Field for the second First Name (call it First Name 2, for example). You can select New Custom Field from the dropdown menus on this page.