Hi,
I think you need to consolidate your snapshot.
To check if virtual machine consolidation is required:
- Select a vCenter Server host or a cluster and click the Virtual Machines tab.
- Right-click the menu bar for any virtual machine column and click Needs Consolidation. The Needs Consolidation column appears.
- A Yes status indicates that the snapshot files for the virtual machine should be consolidated and that the virtual machine's Tasks and Events tab shows a configuration problem.
- A No status indicates that the files are OK.
And then Try this Right-click the virtual machine and click Snapshot> Consolidate..
Regards,
Julien