fix(xo-server/importDeltaVm): dont fail on empty VBDs (#3410)

CHANGELOG.md

@@ -12,6 +12,7 @@
 
 - [Remotes] Rename connect(ed)/disconnect(ed) to enable(d)/disable(d) [#3323](https://github.com/vatesfr/xen-orchestra/issues/3323) (PR [#3396](https://github.com/vatesfr/xen-orchestra/pull/3396))
 - [Remotes] Fix error appears twice on testing (PR [#3399](https://github.com/vatesfr/xen-orchestra/pull/3399))
+- [Backup NG] Don't fail on VMs with empty VBDs (like CDs or floppy disks) (PR [#3410](https://github.com/vatesfr/xen-orchestra/pull/3410))
 
 ### Released packages
 

packages/xo-server/src/xapi/index.js

@@ -981,7 +981,10 @@ export default class Xapi extends XapiBase {
     const baseVdis = {}
     baseVm &&
       forEach(baseVm.$VBDs, vbd => {
-        baseVdis[vbd.VDI] = vbd.$VDI
+        const vdi = vbd.$VDI
+        if (vdi !== undefined) {
+          baseVdis[vbd.VDI] = vbd.$VDI
+        }
       })
 
     // 1. Create the VMs.