adding folderpath to display format generates error

Hi

If create a new display format based on simple and add the folder path to the list of columns when I preview any item that has a valid folder path I get the following error:

Processing Error: Back end query
ID
Message
0
An error occurred processing the query submitted by session id cfd0fd17223760cab09b5dc3738ab806c57669ad.
1
[1] 42S22: Invalid column name ‘4957, 4957’. [2] 42S22: Preparing the statement failed: Invalid column name ‘4957, 4957’.

When previewing with just the simple display format OR the simple folderpath display format where the item doesn’t have a folder path It’s all OK.

Any clues?

Cheers
James