Was the attribs exploded or burst? If the former their data is gone (only defaults left), if the later they were changed into Text entities.
Both scenarios is reasonably easy to fix:
The explode simply requires a new make block, though as stated any edited values in the attributes are lost in the explode command. If later edits of the exploded AttDef was made, these actually changed the AttDef's default value so making the block would set the new Attrib's values to these.
The bursted attribs are a bit more complicated in that they need to be "converted" to AttDef's before making the block. Else they'd be un-editable text entities inside the block. There are quite a few Lisps with could do that for you:
Doing a ggogle shows even more to choose from.
