I looked into the duplicity cache folder indicated in that error.
There were a lot of files there, so I archived them and created a fresh cache folder.
That has seemed to resolve the problem. Hopefully the daily automated backups will now resume as normal. I expect they will.
I'll revert and confirm this. Thanks again for your attention on this.
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Issue seems to be resolved.
I looked into the duplicity cache folder indicated in that error.
There were a lot of files there, so I archived them and created a fresh cache folder.
That has seemed to resolve the problem. Hopefully the daily automated backups will now resume as normal. I expect they will.
I'll revert and confirm this. Thanks again for your attention on this.