model migration fails when using a previous client and breaks current client

Take 2

juju bootstrap guimaas
juju bootstrap guimaas g2

juju add-model wishitworked

juju deploy percona-cluster
juju deploy keystone
juju relate percona-cluster keystone

js - wait wait wait

juju show-controller guimaas
guimaas:
  details:
    uuid: f19931fb-0291-4bed-8745-242f53ddaf1d
    controller-uuid: f19931fb-0291-4bed-8745-242f53ddaf1d
  models:
    controller:
      uuid: 6ae8468e-72d3-49e2-85cf-9a4dc9435d3a
      model-uuid: 6ae8468e-72d3-49e2-85cf-9a4dc9435d3a
      machine-count: 1
      core-count: 4
    default:
      uuid: 17603a5d-2ba5-4bd4-824e-d18a77197033
      model-uuid: 17603a5d-2ba5-4bd4-824e-d18a77197033

juju show-controller g2
g2:
  details:
    uuid: 41cb89ae-94cb-4dce-8ec6-f7ee548701f2
    controller-uuid: 41cb89ae-94cb-4dce-8ec6-f7ee548701f2
  models:
    controller:
      uuid: 5c2e11b7-be14-4c57-8068-ff40662934b0
      model-uuid: 5c2e11b7-be14-4c57-8068-ff40662934b0
      machine-count: 1
      core-count: 4
    default:
      uuid: c0da9b79-af77-4e41-80b3-22018ed3ddb6
      model-uuid: c0da9b79-af77-4e41-80b3-22018ed3ddb6
      machine-count: 1
      core-count: 4
    wishitworked:
      uuid: fe632009-ca03-4f66-876e-de2fbd6afdbc
      model-uuid: fe632009-ca03-4f66-876e-de2fbd6afdbc
      machine-count: 2
      core-count: 8

juju migrate wishitworked guimaas
juju show-controller guimaas
guimaas:
  details:
    uuid: f19931fb-0291-4bed-8745-242f53ddaf1d
    controller-uuid: f19931fb-0291-4bed-8745-242f53ddaf1d
  models:
    controller:
      uuid: 6ae8468e-72d3-49e2-85cf-9a4dc9435d3a
      model-uuid: 6ae8468e-72d3-49e2-85cf-9a4dc9435d3a
      machine-count: 1
      core-count: 4
    default:
      uuid: 17603a5d-2ba5-4bd4-824e-d18a77197033
      model-uuid: 17603a5d-2ba5-4bd4-824e-d18a77197033
    wishitworked:
      uuid: fe632009-ca03-4f66-876e-de2fbd6afdbc
      model-uuid: fe632009-ca03-4f66-876e-de2fbd6afdbc
      machine-count: 2
      core-count: 8

juju migrate wishitworked g2
juju show-controller g2
g2:
  details:
    uuid: 41cb89ae-94cb-4dce-8ec6-f7ee548701f2
    controller-uuid: 41cb89ae-94cb-4dce-8ec6-f7ee548701f2
  models:
    controller:
      uuid: 5c2e11b7-be14-4c57-8068-ff40662934b0
      model-uuid: 5c2e11b7-be14-4c57-8068-ff40662934b0
      machine-count: 1
      core-count: 4
    default:
      uuid: c0da9b79-af77-4e41-80b3-22018ed3ddb6
      model-uuid: c0da9b79-af77-4e41-80b3-22018ed3ddb6
      machine-count: 1
      core-count: 4
    wishitworked:
      uuid: fe632009-ca03-4f66-876e-de2fbd6afdbc
      model-uuid: fe632009-ca03-4f66-876e-de2fbd6afdbc
      machine-count: 2
      core-count: 8

juju migrate wishitworked guimaas

juju add-user rick -c g2
juju add-user rick -c guimaas
juju grant rick superuser -c g2
juju grant rick superuser -c guimaas

< go to Mac machine with 2.4.7 homebrew client>
juju register...g2
juju register...guimaas

juju switch g2

juju migrate admin/wishitworked guimaas --debug
10:49:58 INFO juju.cmd supercommand.go:56 running juju [2.4.7 gc go1.11.2]
10:49:58 DEBUG juju.cmd supercommand.go:57 args: []string{"juju", "migrate", "admin/wishitworked", "guimaas", "--debug"}
10:49:58 INFO juju.juju api.go:67 connecting to API addresses: [10.0.0.156:17070]
10:49:58 DEBUG juju.api apiclient.go:883 successfully dialed "wss://10.0.0.156:17070/api"
10:49:58 INFO juju.api apiclient.go:603 connection established to "wss://10.0.0.156:17070/api"
10:49:58 DEBUG juju.api monitor.go:35 RPC connection died
10:49:58 INFO juju.juju api.go:67 connecting to API addresses: [10.0.0.32:17070]
10:49:58 DEBUG juju.api apiclient.go:883 successfully dialed "wss://10.0.0.32:17070/api"
10:49:58 INFO juju.api apiclient.go:603 connection established to "wss://10.0.0.32:17070/api"
ERROR target prechecks failed: model fe632009-ca03-4f66-876e-de2fbd6afdbc has been removed (not found)
10:49:58 DEBUG cmd supercommand.go:459 error stack:
target prechecks failed: model fe632009-ca03-4f66-876e-de2fbd6afdbc has been removed (not found)
github.com/juju/juju/api/controller/controller.go:331:

<Note the model UUID is in fact the UUID of the wishitworked model. Not sure what it thinks has been removed>

<move back to the admin user on the 2.5-rc1 client>

juju migrate wishitworked guimaas --debug
10:57:49 INFO juju.cmd supercommand.go:57 running juju [2.5-rc1 gc go1.10.4]
10:57:49 DEBUG juju.cmd supercommand.go:58 args: []string{"/snap/juju/6172/bin/juju", "migrate", "wishitworked", "guimaas", "--debug"}
10:57:49 INFO juju.juju api.go:67 connecting to API addresses: [10.0.0.32:17070]
10:57:49 DEBUG juju.api apiclient.go:883 successfully dialed "wss://10.0.0.32:17070/api"
10:57:49 INFO juju.api apiclient.go:603 connection established to "wss://10.0.0.32:17070/api"
ERROR target prechecks failed: model fe632009-ca03-4f66-876e-de2fbd6afdbc has been removed (not found)
10:57:49 DEBUG cmd supercommand.go:496 error stack:
target prechecks failed: model fe632009-ca03-4f66-876e-de2fbd6afdbc has been removed (not found)
/build/juju/parts/juju/go/src/github.com/juju/juju/api/controller/controller.go:331: