The migrated sidecar agents in a k8s model keep restarting due to a mismatch charmModifiedVersion.
Reproduce steps:
juju deploy prometheus-k8s --trust
juju deploy cs:~juju/mariadb-k8s-3
juju migrate k1:t1 k2
unit-prometheus-k8s-0: 17:46:42 INFO juju.worker.uniter unit "prometheus-k8s/0" started
unit-prometheus-k8s-0: 17:46:42 WARNING juju.worker.uniter charmModifiedVersion: 1, u.enforcedCharmModifiedVersion 0
unit-prometheus-k8s-0: 17:46:42 INFO juju.worker.uniter remote charm modified version (1) does not match agent's (0)
unit-prometheus-k8s-0: 17:46:42 INFO juju.worker.uniter unit "prometheus-k8s/0" shutting down: agent should be terminated
unit-prometheus-k8s-2: 17:46:54 INFO juju.cmd running containerAgent [2.9.43 1b2c08fb16deae89ee6ef6f26bcbf08b8d4cf04e gc go1.19.6]
unit-prometheus-k8s-2: 17:46:54 INFO juju.cmd.containeragent.unit start "unit"
unit-prometheus-k8s-2: 17:46:54 INFO juju.worker.upgradesteps upgrade steps for 2.9.43 have already been run.
unit-prometheus-k8s-2: 17:46:54 INFO juju.worker.probehttpserver starting http server on [::]:65301
unit-prometheus-k8s-2: 17:46:54 INFO juju.api cannot resolve "controller-service.controller-k2.svc.cluster.local": lookup controller-service.controller-k2.svc.cluster.local: operation was canceled
unit-prometheus-k8s-2: 17:46:54 INFO juju.api connection established to "wss://10.152.183.142:17070/model/31be4e66-318d-4c13-8881-9bff9d70b896/api"
unit-prometheus-k8s-2: 17:46:54 INFO juju.worker.apicaller [31be4e] "unit-prometheus-k8s-2" successfully connected to "10.152.183.142:17070"
unit-prometheus-k8s-2: 17:46:54 INFO juju.api connection established to "wss://controller-service.controller-k2.svc.cluster.local:17070/model/31be4e66-318d-4c13-8881-9bff9d70b896/api"
unit-prometheus-k8s-2: 17:46:54 INFO juju.worker.apicaller [31be4e] "unit-prometheus-k8s-2" successfully connected to "controller-service.controller-k2.svc.cluster.local:17070"
unit-prometheus-k8s-2: 17:46:54 INFO juju.worker.migrationminion migration phase is now: NONE
unit-prometheus-k8s-2: 17:46:54 INFO juju.worker.logger logger worker started
unit-prometheus-k8s-2: 17:46:54 INFO juju.worker.leadership prometheus-k8s leadership for prometheus-k8s/2 denied
unit-prometheus-k8s-2: 17:46:54 WARNING juju.worker.proxyupdater unable to set snap core settings [proxy.http= proxy.https= proxy.store=]: exec: "snap": executable file not found in $PATH, output: ""
unit-prometheus-k8s-2: 17:46:55 INFO juju.worker.caasupgrader abort check blocked until version event received
unit-prometheus-k8s-2: 17:46:55 INFO juju.worker.caasupgrader unblocking abort check
unit-prometheus-k8s-2: 17:46:55 INFO juju.agent.tools ensure jujuc symlinks in /var/lib/juju/tools/unit-prometheus-k8s-2
unit-prometheus-k8s-2: 17:46:55 INFO juju.worker.uniter unit "prometheus-k8s/2" started
unit-prometheus-k8s-2: 17:46:55 WARNING juju.worker.uniter charmModifiedVersion: 1, u.enforcedCharmModifiedVersion 0
unit-prometheus-k8s-2: 17:46:55 INFO juju.worker.uniter remote charm modified version (1) does not match agent's (0)
unit-prometheus-k8s-2: 17:46:55 INFO juju.worker.uniter unit "prometheus-k8s/2" shutting down: agent should be terminated
unit-prometheus-k8s-0: 17:47:17 INFO juju.cmd running containerAgent [2.9.43 1b2c08fb16deae89ee6ef6f26bcbf08b8d4cf04e gc go1.19.6]
unit-prometheus-k8s-0: 17:47:17 INFO juju.cmd.containeragent.unit start "unit"
unit-prometheus-k8s-0: 17:47:17 INFO juju.worker.upgradesteps upgrade steps for 2.9.43 have already been run.
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