OpenNebula

When a lease is marked as used in the DB, only the IP is checked.
So if there are more leases with the same IP, but belonging to different VNets, all of them are modified.

If this two networks are created

NAME   = "Net number one" 
  TYPE   = FIXED
  BRIDGE = br1
  LEASES = [IP=130.10.0.1, MAC=50:20:20:20:20:20]

NAME   = "Net number two" 
  TYPE   = FIXED
  BRIDGE = br9
  LEASES = [IP=130.10.3.1, MAC=50:20:20:20:20:21]
  LEASES = [IP=130.10.0.1, MAC=50:20:20:20:20:22]

Then the table "leases" in the DB looks like:

oid = 0
        ip = 2181693441
mac_prefix = 20512
mac_suffix = 538976288
       vid = -1
      used = 0

oid = 1
        ip = 2181693445
mac_prefix = 20512
mac_suffix = 538976289
       vid = -1
      used = 0

oid = 1
        ip = 2181693441
mac_prefix = 20512
mac_suffix = 538976290
       vid = -1
      used = 0

And if the IP 130.10.0.1 from "Another Network" is leased to a VM with ID 123, both leases are marked as used:

oid = 0
        ip = 2181693441
mac_prefix = 20512
mac_suffix = 538976288
       vid = 1234
      used = 1

oid = 1
        ip = 2181693445
mac_prefix = 20512
mac_suffix = 538976289
       vid = -1
      used = 0

oid = 1
        ip = 2181693441
mac_prefix = 20512
mac_suffix = 538976290
       vid = 1234
      used = 1

Probable fix: Check also the oid of the lease before tagging it as used