Problem with upgrade from 3.x>5.4.10 | error from 5.4.10 to latest 6.x

Hi, i have Debian 11 and Rocketchat via snap.
i make upgrade from 3x to 4x, then to 5x and all was OK

From 5 to 6 i have this error :

root@webserver:~# sudo snap refresh rocketchat-server
2023-05-25T12:14:15+02:00 INFO Waiting for “snap.rocketchat-server.rocketchat-mongo.service” to stop.
error: cannot perform the following tasks:

Start snap “rocketchat-server” (1557) services (systemctl command [start snap.rocketchat-server.rocketchat-mongo.service] failed with exit status 1: Job for snap.rocketchat-server.rocketchat-mongo.service failed because the control process exited with error code.
See “systemctl status snap.rocketchat-server.rocketchat-mongo.service” and “journalctl -xe” for details.
)
Server Setup Information
root@webserver:~# snap info rocketchat-server
name: rocketchat-server
summary: Rocket.Chat server
publisher: Rocket.Chat (rocketchat✓)
license: unset
description: |
Have your own Slack like online chat, built with Meteor. https://rocket.chat/
commands:

rocketchat-server.backupdb
rocketchat-server.mongo
rocketchat-server.restoredb
services:
rocketchat-server.rocketchat-caddy: simple, enabled, inactive
rocketchat-server.rocketchat-mongo: forking, enabled, active
rocketchat-server: simple, enabled, active
snap-id: wdBUbiEuMNHmAHLBCXQXOcXaOCvbWS1e
tracking: 6.x/stable
refresh-date: today at 10:04 CEST
channels:
6.x/stable: 6.2.2 2023-05-19 (1557) 317MB -
6.x/candidate: ↑
6.x/beta: ↑
6.x/edge: 6.2.2 2023-05-19 (1557) 317MB -
latest/stable: 6.1.5 2023-04-26 (1547) 326MB -
latest/candidate: ↑
latest/beta: ↑
latest/edge: ↑
5.x/stable: 5.4.10 2023-05-19 (1556) 301MB -
5.x/candidate: 5.4.4 2023-03-09 (1540) 300MB -
5.x/beta: 5.4.4 2023-03-09 (1540) 300MB -
5.x/edge: 5.4.10 2023-05-19 (1556) 301MB -
4.x/stable: 4.8.7 2022-12-04 (1533) 281MB -
4.x/candidate: ↑
4.x/beta: ↑
4.x/edge: ↑
installed: 5.4.10 (1555) 301MB -
info from journalctl -xe

May 25 12:51:47 webserver audit[16961]: AVC apparmor=“DENIED” operation=“open” profile=“snap.rocketchat-server.rocketchat-mongo” name=“/proc/16961/net/netstat” pid=16961 comm=“ftdc” requested_mask>
May 25 12:51:47 webserver audit[16961]: AVC apparmor=“DENIED” operation=“open” profile=“snap.rocketchat-server.rocketchat-mongo” name=“/proc/16961/net/snmp” pid=16961 comm=“ftdc” requested_mask=“r>
May 25 12:51:47 webserver audit[16961]: AVC apparmor=“DENIED” operation=“open” profile=“snap.rocketchat-server.rocketchat-mongo” name=”/proc/16961/mountinfo" pid=16961 comm=“ftdc” requested_mask=“>
May 25 12:51:47 webserver audit[16961]: AVC apparmor=“DENIED” operation=“open” profile=“snap.rocketchat-server.rocketchat-mongo” name=”/proc/vmstat" pid=16961 comm=“ftdc” requested_mask=“r” denied>
May 25 12:51:48 webserver kernel: audit: type=1400 audit(1685011907.999:41505): apparmor=“DENIED” operation=“open” profile=“snap.rocketchat-server.rocketchat-mongo” name=“/proc/16961/net/netstat” >
May 25 12:51:48 webserver kernel: audit: type=1400 audit(1685011907.999:41506): apparmor=“DENIED” operation=“open” profile=“snap.rocketchat-server.rocketchat-mongo” name=“/proc/16961/net/snmp” pid>
May 25 12:51:48 webserver kernel: audit: type=1400 audit(1685011907.999:41507): apparmor=“DENIED” operation=“open” profile=“snap.rocketchat-server.rocketchat-mongo” name=“/proc/16961/mountinfo” pi>
May 25 12:51:48 webserver kernel: audit: type=1400 audit(1685011907.999:41508): apparmor=“DENIED” operation=“open” profile=“snap.rocketchat-server.rocketchat-mongo” name=“/proc/vmstat” pid=16961 c>
May 25 12:51:48 webserver audit[16961]: AVC apparmor=“DENIED” operation=“open” profile=“snap.rocketchat-server.rocketchat-mongo” name=“/proc/16961/net/netstat” pid=16961 comm=“ftdc” requested_mask>
May 25 12:51:48 webserver audit[16961]: AVC apparmor=“DENIED” operation=“open” profile=“snap.rocketchat-server.rocketchat-mongo” name=“/proc/16961/net/snmp” pid=16961 comm=“ftdc” requested_mask=“r>
May 25 12:51:48 webserver audit[16961]: AVC apparmor=“DENIED” operation=“open” profile=“snap.rocketchat-server.rocketchat-mongo” name=”/proc/16961/mountinfo" pid=16961 comm=“ftdc” requested_mask=“>
May 25 12:51:48 webserver audit[16961]: AVC apparmor=“DENIED” operation=“open” profile=“snap.rocketchat-server.rocketchat-mongo” name=”/proc/vmstat" pid=16961 comm=“ftdc” requested_mask=“r” denied>
May 25 12:51:49 webserver kernel: audit: type=1400 audit(1685011908.999:41509): apparmor=“DENIED” operation=“open” profile=“snap.rocketchat-server.rocketchat-mongo” name=“/proc/16961/net/netstat” >
May 25 12:51:49 webserver kernel: audit: type=1400 audit(1685011908.999:41510): apparmor=“DENIED” operation=“open” profile=“snap.rocketchat-server.rocketchat-mongo” name=“/proc/16961/net/snmp” pid>

root@webserver:~# systemctl status snap.rocketchat-server.rocketchat-server.service
● snap.rocketchat-server.rocketchat-server.service - Service for snap application rocketchat-server.rocketchat-server
Loaded: loaded (/etc/systemd/system/snap.rocketchat-server.rocketchat-server.service; enabled; vendor preset: enabled)
Active: active (running) since Mon 2023-05-29 10:51:38 CEST; 27s ago
Main PID: 424125 (start_rocketcha)
Tasks: 12 (limit: 4657)
Memory: 725.8M
CPU: 20.540s
CGroup: /system.slice/snap.rocketchat-server.rocketchat-server.service
├─424125 /bin/bash /snap/rocketchat-server/1555/bin/start_rocketchat.sh
└─424236 node /snap/rocketchat-server/1555/main.js

May 29 10:51:52 webserver rocketchat-server.rocketchat-server[424236]: | MongoDB Version: 4.4.15 |
May 29 10:51:52 webserver rocketchat-server.rocketchat-server[424236]: | MongoDB Engine: wiredTiger |
May 29 10:51:52 webserver rocketchat-server.rocketchat-server[424236]: | Platform: linux |
May 29 10:51:52 webserver rocketchat-server.rocketchat-server[424236]: | Process Port: 3000 |
May 29 10:51:52 webserver rocketchat-server.rocketchat-server[424236]: | Site URL: http://192.168.1.107:3000 |
May 29 10:51:52 webserver rocketchat-server.rocketchat-server[424236]: | ReplicaSet OpLog: Enabled |
May 29 10:51:52 webserver rocketchat-server.rocketchat-server[424236]: | Commit Hash: ba268c5004 |
May 29 10:51:52 webserver rocketchat-server.rocketchat-server[424236]: | Commit Branch: HEAD |
May 29 10:51:52 webserver rocketchat-server.rocketchat-server[424236]: | |
May 29 10:51:52 webserver rocketchat-server.rocketchat-server[424236]: +--------------------------------------------------+

root@webserver:~# sudo tail -f /var/log/syslog
May 29 10:55:07 webserver kernel: [230489.774135] audit: type=1400 audit(1685350506.999:915759): apparmor="DENIED" operation="open" profile="snap.rocketchat-server.rocketchat-mongo" name="/proc/vmstat" pid=423960 comm="ftdc" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
May 29 10:55:08 webserver kernel: [230490.774140] audit: type=1400 audit(1685350507.999:915760): apparmor="DENIED" operation="open" profile="snap.rocketchat-server.rocketchat-mongo" name="/proc/423960/mountinfo" pid=423960 comm="ftdc" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
May 29 10:55:08 webserver kernel: [230490.774148] audit: type=1400 audit(1685350507.999:915761): apparmor="DENIED" operation="open" profile="snap.rocketchat-server.rocketchat-mongo" name="/proc/vmstat" pid=423960 comm="ftdc" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
May 29 10:55:09 webserver kernel: [230491.774023] audit: type=1400 audit(1685350508.999:915762): apparmor="DENIED" operation="open" profile="snap.rocketchat-server.rocketchat-mongo" name="/proc/423960/mountinfo" pid=423960 comm="ftdc" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
May 29 10:55:09 webserver kernel: [230491.774031] audit: type=1400 audit(1685350508.999:915763): apparmor="DENIED" operation="open" profile="snap.rocketchat-server.rocketchat-mongo" name="/proc/vmstat" pid=423960 comm="ftdc" requested_mask="r" denied_mask="r" fsuid=0 ouid=0

Start by reproducing the snap refresh from 5.4.10 to 6.2.2 on Debian 11, then inspect the shown systemctl status, journalctl, and AppArmor audit output for the rocketchat-mongo service. Done means the upgrade completes and both the MongoDB and Rocket.Chat services start successfully without the reported failure.