Corrupted buckets after server "power loss"

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Hello,

I'm using the latest InfluxDB 2 on a windows machine. I migrated last week from V1.8 which has been running flawlessly for the last 3 years.

This morning this windows server crashed as it sometimes do (it is a virtual machine, so it is not a physical hardware problem).
From this time Influxdb stopped writing on most buckets.

My problem is very similar to this one : https://github.com/influxdata/influxdb/issues/9949

I can see thousands of these two messages :
"write_errors"
[shard 1997] invalid character '\x00' looking for beginning of value
[shard 1993] invalid character '\x00' looking for beginning of value

I don't know how to repair this. I found the two folders 1997 and 1993, but I don't know how to handle this problem.

You can find attached the file that I found in the 1997 folder.
[fields.idx.txt](https://github.com/influxdata/influxdb/files/6605478/fields.idx.txt)

I tried to see if I could repair some tsm files like on the other ticket, but I have 273 tsm files.
Thank you by advance for your help.

Start by comparing the reported errors and attached fields.idx.txt from shard folders 1997 and 1993 with the prior issue #9949. Review how the 273 TSM files are handled after the Windows server power loss. Done is not defined in the report because it does not specify a supported repair procedure or an expected recovery result.

Written by the indexing model from the issue text.