Backup started failing due to db usage

[ptruman]

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Has the way portainer manages/accesses it's files changed recently?

I'm using Duplicati to backup my docker folder structure (config etc) and I keep getting this nightly now :

2025-01-18 03:15:53 +00 - [Warning-Duplicati.Library.Main.Operation.Backup.FileBlockProcessor.FileEntry-PathProcessingFailed]: Failed to process path: /sharedfolders/SFDocker/host/volumes/portainer_data/_data/**portainer.db**
IOException: The process cannot access the file '/sharedfolders/SFDocker/host/volumes/portainer_data/_data/portainer.db' because it is being used by another process.,
2025-01-18 03:15:53 +00 - [Warning-Duplicati.Library.Main.Operation.Backup.FileBlockProcessor.FileEntry-PathProcessingFailed]: Failed to process path: /sharedfolders/SFDocker/host/volumes/portainer_data/_data/**useractivity.db**
IOException: The process cannot access the file '/sharedfolders/SFDocker/host/volumes/portainer_data/_data/useractivity.db' because it is being used by another process.,
2025-01-18 03:17:12 +00 - [Warning-Duplicati.Library.Main.Operation.Backup.FileBlockProcessor.FileEntry-PathProcessingFailed]: Failed to process path: /sharedfolders/SFDocker/host/network/files/**local-kv.db**
IOException: The process cannot access the file '/sharedfolders/SFDocker/host/network/files/local-kv.db' because it is being used by another process.

Seems to have started 4th Dec or thereabouts.

Using Business Edition 2.21.5 presently.