Snapshot generation fails at height: 1659695

[Jsewill]

While generating the snapshot generation fails after almost a day of runtime, at height 1659695, with the following truncated output:

....

INFO:CatSnapshot:coin_name c8cc80908629b6afa3fda412f9db641033de65ae59751db7ccfb4dda0812359b amount 7736658533 tail_hash b7c0b9c3a59898a8a9e9be1e9d77d63be558bc57060257a2a667c8ca7ab687a8 spent_height 1675378
INFO:CatSnapshot:Persisted CAT coin created with name a7b64fb17a2d9637eebc4edbd0e9b84bdb9f291fa6e760e9ad1ec6c30773f0e1, TAIL b7c0b9c3a59898a8a9e9be1e9d77d63be558bc57060257a2a667c8ca7ab687a8, height 1675378
INFO:CatSnapshot:Persisted CAT coin created with name a7514065b5653d9517b3e2d4c38d4f5e6dba594a94d55e9ba7a5d11cd861190d, TAIL b7c0b9c3a59898a8a9e9be1e9d77d63be558bc57060257a2a667c8ca7ab687a8, height 1675378
INFO:CatSnapshot:coin_name 9e209f34e4c322d2c8b55bf1916dcee810c5727ed836c05b7364112f9aca29c0 amount 1032000 tail_hash 7f3584af7b574030af5be244b6ae332fd3820b44e96e4880bbe7aa8cc05edc88 spent_height 1659695
Traceback (most recent call last):
  File "start.py", line 15, in <module>
    asyncio.run(main())
  File "/usr/lib/python3.7/asyncio/runners.py", line 43, in run
    return loop.run_until_complete(main)
  File "/usr/lib/python3.7/asyncio/base_events.py", line 587, in run_until_complete
    return future.result()
  File "start.py", line 12, in main
    await cat_snapshot.generate()
  File "/home/farmer/Crypto/chia/cat1_snapshot/src/cat_snapshot.py", line 126, in generate
    persist_coin_create(cursor, coin_create_record)
  File "/home/farmer/Crypto/chia/cat1_snapshot/src/database.py", line 89, in persist_coin_create
    coin_create_record.created_height
sqlite3.IntegrityError: UNIQUE constraint failed: coin_create.coin_name
ERROR:asyncio:Unclosed client session
client_session: <aiohttp.client.ClientSession object at 0x7f8c65328690>

UPDATE:

I also tried running a much smaller snapshot, one at the beginning of the original height range, and one at the end, but the result was the same.