Problem using mimirtool backfill

[brewagebear]

Previously, I created a snapshot of Prometheus in order to migrate from Prometheus to Mimir.

However, I encountered an error like this:
422 Unprocessable Entity, body: "block time range crosses boundary of configured compactor time range (1d).

After doing some research on Google, I found an issue like #9910.
I then regenerated the snapshot using the splitblock tool with a 24-hour block size.

./splitblocks \
  --backend filesystem \
  --filesystem.dir /apps/prometheus/data/20250929T111517Z-6b4dca01acc22919 \
  --output.dir  /apps/prometheus/data/splitblocks \
  --blocks 01JRJ8BN2V7MJ8VCAESASR35K7,01JT6CX4X0X8DEVSRXSSCPKZAT,01JVTHF28BPHBWVCNA0EBZ61D7,01JXEP0JES2975PKNZZMS5Q4B0,01JZ2TJ6ADDMT3ARMM4TN43F07,01K0PZ3NRE5XTAM6P3GHZM0RTX,01K2B3N518902GFR0Q2AJQ43Q3,01K2WFP5NP1A8PP0PH514ZQ2RD,01K3DVW5SWJFYENR920XTV3N2G,01K3KN6VY4ZZHKKV01EDEKVA47,01K3SEKG1MWJF9VP6N28ZN7WRR,01K3VCCEZQRGD5B6ZE4G6PZR56,01K3XA604G72MEB4Q4GJQ8JTBS,01K3Z7ZHFC48M5M5BEGREMFYWE,01K415S2ZFXX3QZ9PBXGVF5STC,01K41TBTHQ5WJD0Q5QP369SPD9,01K42EZ0EMBMYK6RT557PKQK5S,01K433J6CKRZVAFAWA1Y391HB5,01K451BYMR637BQH7BHGGX0FW2,01K4ATS9KJGXM8PN80RQFYE7QK,01K4GM5XBAA6JF46ZVYV9AWWAF,01K520DKXDQ0NPN76733Z12NAZ,01K5KCKH08663RE621QJZCS5Q2,01K64RSF3CW6SAAFC98CEE2Z77,01K6AB6PNGW79NC7MMDHH17XZG,01K6AJ2E96MFCF88N3H996NDYY,01K6AJ48FXSN7R1AKZTVQWWT7Q,01K6AJY7E4VCZ6J0ZHV0EH1B25 \
  --full

However, when I performed the backfill again with mimirtool, the following error occurred:

$ ./bin/mimirtool backfill --address=http://localhost:9009/ --id=anonymous /apps/prometheus/data/splitblocks/01K6CNDGE792S9QH2N8GQCQVEF
INFO[0000] Backfilling                                   blocks=/apps/prometheus/data/splitblocks/01K6CNDGE792S9QH2N8GQCQVEF user=anonymous
INFO[0000] making request to start block upload          block=01K6CNDGE792S9QH2N8GQCQVEF file=meta.json path=/apps/prometheus/data/splitblocks/01K6CNDGE792S9QH2N8GQCQVEF
INFO[0001] uploading block file                          block=01K6CNDGE792S9QH2N8GQCQVEF file=index path=/apps/prometheus/data/splitblocks/01K6CNDGE792S9QH2N8GQCQVEF size=245909729
ERRO[0009] response                                      body="internal server error (id 1869ff05fd63b533)\n" status="500 Internal Server Error"
ERRO[0009] failed uploading block                        error="request to upload file \"/apps/prometheus/data/splitblocks/01K6CNDGE792S9QH2N8GQCQVEF/index\" failed: POST request to http://localhost:9009/api/v1/upload/block/01K6CNDGE792S9QH2N8GQCQVEF/files?path=index failed: server returned HTTP status: 500 Internal Server Error, body: \"internal server error (id 1869ff05fd63b533)\\n\"" path=/apps/prometheus/data/splitblocks/01K6CNDGE792S9QH2N8GQCQVEF
INFO[0009] finished uploading blocks                     already_exists=0 failed=1 succeeded=0
mimirtool: error: blocks failed to upload 1 block(s), try --help

When I examined the Mimir logs regarding this issue, I found the following log:

ts=2025-09-30T07:32:10.62127951Z caller=block_upload.go:107 level=info component=compactor user=anonymous feature="block upload" block=01K6CNDGE792S9QH2N8GQCQVEF operation="start block upload" request_id=1869ff05dc1d7c68 msg="started block upload"
ts=2025-09-30T07:32:18.458424923Z caller=block_upload.go:355 level=error component=compactor user=anonymous feature="block upload" block=01K6CNDGE792S9QH2N8GQCQVEF operation="block file upload" request=1869ff05fd63b533 msg="failed uploading block file to bucket" destination=01K6CNDGE792S9QH2N8GQCQVEF/index err="upload s3 object: The Content-MD5 you specified did not match what we received."
ts=2025-09-30T07:32:18.458825036Z caller=logging.go:144 level=warn msg="POST /api/v1/upload/block/01K6CNDGE792S9QH2N8GQCQVEF/files?path=index (500) 7.80267308s Response: \"internal server error (id 1869ff05fd63b533)\\n\""

After searching for information about the above, I couldn't find any clues, so I'm leaving this here.
I use s3 for block storage backend, is this causing it?