General issue - CodeQL exiting with exit code 2

/apps/actions-runner/_work/_tool/CodeQL/2.15.2/x64/codeql/codeql database finalize --finalize-dataset --threads=4 --ram=14356 /apps/actions-runner/_work/_temp/codeql_databases/csharp
Running pre-finalize script /apps/actions-runner/_work/_tool/CodeQL/2.15.2/x64/codeql/csharp/tools/pre-finalize.sh in /apps/actions-runner/_work/*/*.
Running TRAP import for CodeQL database at /apps/actions-runner/_work/_temp/codeql_databases/csharp...
A fatal error occurred: Dataset /apps/actions-runner/_work/_temp/codeql_databases/csharp/db-csharp has been finalized and does not support further TRAP import.
A fatal error occurred: Dataset import for /apps/actions-runner/_work/_temp/codeql_databases/csharp/db-csharp failed with code 2.
Error: Encountered a fatal error while running "/apps/actions-runner/_work/_tool/CodeQL/2.15.2/x64/codeql/codeql database finalize --finalize-dataset --threads=4 --ram=14356 /apps/actions-runner/_work/_temp/codeql_databases/csharp". Exit code was 2 and error was: A fatal error occurred: Dataset import for /apps/actions-runner/_work/_temp/codeql_databases/csharp/db-csharp failed with code 2. Context: A fatal error occurred: Dataset /apps/actions-runner/_work/_temp/codeql_databases/csharp/db-csharp has been finalized and does not support further TRAP import. See the logs for more details.

This is issue is fixed if I delete the database folder but it will start up again. We had been running CodeQL nightly for months and then this issue began. I have checked the disk space and that does not seem to be an issue. Any ideas how to fix this?

Start with the reported `codeql database finalize` command and the C# `pre-finalize.sh` path in the logs. Investigate why `db-csharp` is finalized before TRAP import, using the database folder deletion workaround as a comparison; done means identifying a reproducible cause and documenting a reliable fix.

Written by the indexing model from the issue text.