** Description changed:

  When I add only one L2TP VPN profile to gnome-control-center's Network >
  VPN settings, it works fine.
  
  However, if I add a 2nd L2TP VPN, the 2nd L2TP VPN, not only doesn't
  work, but it corrupts the first L2TP VPN so that it too stops working.
  
  Furthermore, if I remove 2nd L2TP VPN profile (that corrupted the first
  L2TP VPN) this does NOT repair the corruption to the first L2TP VPN, it
  remains corrupted.
  
  Additionally, removing all VPN profiles and re-adding the first one
  back, doesn't repair the corruption. Rebooting and adding them back
  doesn't work either.
  
  The only thing that works, that I've found, is completely reinstalling
  Ubuntu 19.10. Please advise better workarounds than reinstalling.
+ 
+ In case it matters, these additional packages were also required for my
+ initial VPN setup:
+ 
+ sudo apt-get install -y network-manager-l2tp network-manager-l2tp-gnome
+ strongswan
  
  Here's what's in the syslog on a failed VPN Connection attempt:
  
  Oct 26 02:58:35 workstation5 NetworkManager[1241]: <info>  [1572076715.5632] 
audit: op="connection-activate" uuid="1942cf95-93b1-4e74-a44a-947a46bffb5a" 
name="L2TP VPN1" pid=3531 uid=1000 result="success"
  Oct 26 02:58:35 workstation5 NetworkManager[1241]: <info>  [1572076715.5702] 
vpn-connection[0x5642f421c750,1932cf95-91b1-4e85-a44a-498a56befb5a,"L2TP 
VPN1",0]: Started the VPN service, PID 7273
  Oct 26 02:58:35 workstation5 NetworkManager[1241]: <info>  [1572076715.5747] 
vpn-connection[0x5642f421c750,1932cf95-91b1-4e85-a44a-498a56befb5a,"L2TP 
VPN1",0]: Saw the service appear; activating connection
  Oct 26 02:58:35 workstation5 NetworkManager[1241]: <info>  [1572076715.6566] 
vpn-connection[0x5642f421c750,1932cf95-91b1-4e85-a44a-498a56befb5a,"L2TP 
VPN1",0]: VPN connection: (ConnectInteractive) reply received
  Oct 26 02:58:35 workstation5 NetworkManager[1241]: Stopping strongSwan IPsec 
failed: starter is not running
  Oct 26 02:58:37 workstation5 NetworkManager[1241]: Starting strongSwan 5.7.2 
IPsec [starter]...
  Oct 26 02:58:37 workstation5 NetworkManager[1241]: Loading config setup
  Oct 26 02:58:37 workstation5 NetworkManager[1241]: Loading conn 
'1942cf95-93b1-4e74-a44a-947a46bffb5a'
  Oct 26 02:58:37 workstation5 NetworkManager[1241]: found netkey IPsec stack
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: Stopping strongSwan 
IPsec...
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: initiating Main Mode 
IKE_SA 1942cf95-93b1-4e74-a44a-947a46bffb5a[1] to 49.230.24.121
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: generating ID_PROT request 
0 [ SA V V V V V ]
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: sending packet: from 
192.168.1.2[500] to 49.230.24.121[500] (236 bytes)
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: received packet: from 
49.230.24.121[500] to 192.168.1.2[500] (156 bytes)
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: parsed ID_PROT response 0 
[ SA V V V V ]
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: received XAuth vendor ID
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: received DPD vendor ID
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: received FRAGMENTATION 
vendor ID
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: received NAT-T (RFC 3947) 
vendor ID
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: selected proposal: 
IKE:3DES_CBC/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1024
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: generating ID_PROT request 
0 [ KE No NAT-D NAT-D ]
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: sending packet: from 
192.168.1.2[500] to 49.230.24.121[500] (244 bytes)
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: received packet: from 
49.230.24.121[500] to 192.168.1.2[500] (244 bytes)
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: parsed ID_PROT response 0 
[ KE No NAT-D NAT-D ]
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: local host is behind NAT, 
sending keep alives
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: generating ID_PROT request 
0 [ ID HASH ]
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: sending packet: from 
192.168.1.2[4500] to 49.230.24.121[4500] (68 bytes)
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: received packet: from 
49.230.24.121[500] to 192.168.1.2[500] (68 bytes)
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: invalid HASH_V1 payload 
length, decryption failed?
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: could not decrypt payloads
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: message parsing failed
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: ignore malformed 
INFORMATIONAL request
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: INFORMATIONAL_V1 request 
with message ID 3016741680 processing failed
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: sending retransmit 1 of 
request message ID 0, seq 3
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: sending packet: from 
192.168.1.2[4500] to 49.230.24.121[4500] (68 bytes)
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: received packet: from 
49.230.24.121[500] to 192.168.1.2[500] (68 bytes)
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: invalid HASH_V1 payload 
length, decryption failed?
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: could not decrypt payloads
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: message parsing failed
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: ignore malformed 
INFORMATIONAL request
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: INFORMATIONAL_V1 request 
with message ID 394520243 processing failed
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: destroying IKE_SA in state 
CONNECTING without notification
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: establishing connection 
'1942cf95-93b1-4e74-a44a-947a46bffb5a' failed
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: <info>  [1572076728.9330] 
vpn-connection[0x5642f421c750,1932cf95-91b1-4e85-a44a-498a56befb5a,"L2TP 
VPN1",0]: VPN plugin: state changed: stopped (6)
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: <info>  [1572076728.9348] 
vpn-connection[0x5642f421c750,1932cf95-91b1-4e85-a44a-498a56befb5a,"L2TP 
VPN1",0]: VPN service disappeared
  Oct 26 02:58:48 workstation5 NetworkManager[1241]: <warn>  [1572076728.9356] 
vpn-connection[0x5642f421c750,1932cf95-91b1-4e85-a44a-498a56befb5a,"L2TP 
VPN1",0]: VPN connection: failed to connect: 'Message recipient disconnected 
from message bus without replying'
  
  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: gnome-control-center 1:3.34.1-1ubuntu2
  ProcVersionSignature: Ubuntu 5.3.0-19.20-generic 5.3.1
  Uname: Linux 5.3.0-19-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu8
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Oct 26 02:36:56 2019
  InstallationDate: Installed on 2019-10-19 (6 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: gnome-control-center
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/1849930

Title:
  Additional VPN Breaks First VPN

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