upgrade Nav 2009 R2 to Nav 2013

The object Upgrade601701.1.fob has been imported in Nav 2009 and form 104001 - Upgrade - Old version is being run

When selecting “transfer data”, I’m getting the below error:

"The definition of the field location code has been changed after the object was save.

Old Type: Code

New type:Date

How to identity which object was saved and how to proceed with the transfer of data

You can check with activating debugger and re doing the process.