file format error

I am using Calc to catalog my music files. I saved the file, now trying to open it gives:
Read-Error Format error discovered in the file in sub-document content.xml at 2,954671(row,col) and closes the file.
A similar error was fixed in 2018, but no details given, someone apparently was able to open the file an repair it.
List.ods
I have a backup, but would lose several hours of work. Thanks for any help

Make sure your disk isn’t short before completely failing… however, the .zip is broken

testing: Thumbnails/thumbnail.png   bad CRC a99df17e  (should be 3b44969e)
file #15:  bad zipfile offset (local header sig):  19183
testing: META-INF/manifest.xml    OK
testing: content.xml              bad CRC 11d399f5  (should be 3d6ad1a0)

The thumbnail.png is broken. But worse, the content.xml is also broken and can’t be fully restored, it starts having plenty of errors at 60% of the file. I suggest you rather restore from your backup, you’d probably lose less.