conversion fails from tpc-ds scale factor 1

[marsupialtail]

(base) ziheng@ziheng-VLT-WX0:~/tpctools$ RUST_BACKTRACE=full cargo run --release -- convert --benchmark tpcds --input /home/ziheng/Downloads/DSGen-software-code-3.2.0rc1/tools/tpcds/ --output data
Finished release [optimized] target(s) in 0.11s
Running target/release/tpctools convert --benchmark tpcds --input /home/ziheng/Downloads/DSGen-software-code-3.2.0rc1/tools/tpcds/ --output data
thread 'main' panicked at 'output dir already exists: data/call_center.parquet', /home/ziheng/tpctools/src/lib.rs:69:13
stack backtrace:
0: 0x55b370645fbd - std::backtrace_rs::backtrace::libunwind::trace::hb729d9642bb971eb
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
1: 0x55b370645fbd - std::backtrace_rs::backtrace::trace_unsynchronized::h373bb774579df5c7
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x55b370645fbd - std::sys_common::backtrace::_print_fmt::hfbd4e92d240c89bb
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/sys_common/backtrace.rs:66:5
3: 0x55b370645fbd - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h8f618991fbf64972
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/sys_common/backtrace.rs:45:22
4: 0x55b37066e79c - core::fmt::write::hc69b5b640d88cce8
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/core/src/fmt/mod.rs:1196:17
5: 0x55b370641b11 - std::io::Write::write_fmt::h3403cef06a24a303
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/io/mod.rs:1654:15
6: 0x55b370647935 - std::sys_common::backtrace::_print::h368f27cdedea0e52
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/sys_common/backtrace.rs:48:5
7: 0x55b370647935 - std::sys_common::backtrace::print::ha105c9cf5a64cd17
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/sys_common/backtrace.rs:35:9
8: 0x55b370647935 - std::panicking::default_hook::{{closure}}::h48ed2c3707d5e20e
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/panicking.rs:295:22
9: 0x55b3706475a9 - std::panicking::default_hook::h8744fc5cea5e3110
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/panicking.rs:314:9
10: 0x55b370647f08 - std::panicking::rust_panic_with_hook::hc82286af2030e925
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/panicking.rs:698:17
11: 0x55b370647db7 - std::panicking::begin_panic_handler::{{closure}}::h1c15057c2f09081f
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/panicking.rs:588:13
12: 0x55b370646474 - std::sys_common::backtrace::__rust_end_short_backtrace::h65de906a5330f8da
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/sys_common/backtrace.rs:138:18
13: 0x55b370647ae9 - rust_begin_unwind
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/panicking.rs:584:5
14: 0x55b36f0c1523 - core::panicking::panic_fmt::h741cfbfc95bc6112
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/core/src/panicking.rs:142:14
15: 0x55b36f103def - <core::future::from_generator::GenFuture as core::future::future::Future>::poll::h9fc11d78879fb705
16: 0x55b36f0c7d2a - std::thread::local::LocalKey::with::h4a298cb47c2e5c0c
17: 0x55b36f12005a - tokio::park::thread::CachedParkThread::block_on::hb4a29266691ab0fa
18: 0x55b36f10d3b4 - tokio::runtime::scheduler::multi_thread::MultiThread::block_on::he9eb8c6ff30fa364
19: 0x55b36f0d7f41 - tokio::runtime::Runtime::block_on::h97d6f87026a5a9dc
20: 0x55b36f122a7a - tpctools::main::ha9b2ff94dc2869f8
21: 0x55b36f107bb3 - std::sys_common::backtrace::__rust_begin_short_backtrace::h03fe87987a9bc2d9
22: 0x55b36f0d0bed - std::rt::lang_start::{{closure}}::he22cdc8dacb1df2c
23: 0x55b37063b2ce - core::ops::function::impls::<impl core::ops::function::FnOnce for &F>::call_once::hf833e7144973d4be
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/core/src/ops/function.rs:280:13
24: 0x55b37063b2ce - std::panicking::try::do_call::h79761d203bfb6b46
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/panicking.rs:492:40
25: 0x55b37063b2ce - std::panicking::try::h0561cbbe1722251d
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/panicking.rs:456:19
26: 0x55b37063b2ce - std::panic::catch_unwind::hbca347ddd031b141
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/panic.rs:137:14
27: 0x55b37063b2ce - std::rt::lang_start_internal::{{closure}}::h0492050ad281ec32
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/rt.rs:128:48
28: 0x55b37063b2ce - std::panicking::try::do_call::h3ebce69871996bb3
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/panicking.rs:492:40
29: 0x55b37063b2ce - std::panicking::try::hbed537d20e728475
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/panicking.rs:456:19
30: 0x55b37063b2ce - std::panic::catch_unwind::h4185e2024c6a5d05
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/panic.rs:137:14
31: 0x55b37063b2ce - std::rt::lang_start_internal::h1899cfd715ca6829
at /rustc/a8314ef7d0ec7b75c336af2c9857bfaf43002bfc/library/std/src/rt.rs:128:20
32: 0x55b36f122b52 - main
33: 0x7f64d9a850b3 - __libc_start_main
34: 0x55b36f0c17ce - _start
35: 0x0 -