Old sparsebundle has no volumes

I have old sparsebundle files on my Apple Time Capsule. I can't seem to mount them. Error I get is no volumes found. I can see package contents, and size on disk is 113.4 GB. I've tried: hdiutil attach -nomount -noverify -noautofsck /Volumes/Joy/.sparsebundle, however, that only loads as /dev/disk2, but against it it doesn't say GUID_Partition_scheme and there is no /dev/disk2s1 Apple_partition_map or /dev/disk2s2 Apple_HFSX. I've also tried to use Migration Assistant, it shows the Time Machine sparsebundle, but it says no volumes. Please advise. Can I create a new empty sparsebundle using hdiutil -create, and copy the package contents from the no volume sparsebundle to this new one? Any other ideas how to fix it? Thanks in advance.