You can remove that by selecting the field and looking at the Values. If the Default is set to "Select" in both columns, delete the "Marketo Value" value to blank. You could also just delete that "Select One" altogether.
You can remove that by selecting the field and looking at the Values. If the Default is set to "Select" in both columns, delete the "Marketo Value" value to blank. You could also just delete that "Select One" altogether.