Error code 15: Database lock protocol error

[Shooter3k]

What do these errors mean?

/mnt/z/./tl-tr/tl-tr.xml.zip: preprocessor command failed: '"/home/home/.cargo/bin/rga-preproc" "/mnt/z/./tl-tr/tl-tr.xml.zip"':

/mnt/z/./tl-tr/tl-tr.xml.zip adapter: zip
Error: during preprocessing

Caused by:
0: run_adapter(/mnt/z/./tl-tr/tl-tr.xml.zip)
1: Rusqlite("locking protocol")
2: locking protocol
3: Error code 15: Database lock protocol error

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When running rga on the specific errored file individually, it works fine. It appears this error is only encountered when running from a root folder. Perhaps threads are overlapping each other?