Error when trying to update Shared Field Object

I’m trying to add an image_1_size field to capture the size of uploaded binary data items. However, when I try to add it to our at_SharedDef.xml file I get an error (see attachment error.jpg).

I just saw the attached image and it’s too small to make out what the error is. Here’s the error:

java.rmi.RemoteException: Cannot save the shared definition because it would cause the following problems: The content types […list of content types…] report the follwoing error: The following shared fields excluded by the content editor cannot be located in any of the included shared groups: clob_2, clob_2, clob_2

Any ideas what’s happening here?

Thanks,
Veeren