repro: --pull option stopped working since last Friday

[eng-ts]

Bug Report

Description

the --pull option is not working anymore since Friday. We observed on several project, when data are not present and must be downloaded (fresh remote instances). We got this message: ERROR: failed to reproduce '[...].parquet.dvc': missing data 'source': [...]

Solution: replacing the option by a previous dvc pull command resolves the issue (but download all the data).
Note: data is on AWS S3

Reproduce

I wish i could do that easily. Do you have a model for reproducible example with S3 based cache files?

Expected

--pull should download necessary files. it's not.

Environment information

Output of dvc doctor:

DVC version: 3.66.1 (pip)
-------------------------
Platform: Python 3.12.9 on Linux-6.17.0-14-generic-x86_64-with-glibc2.39
Subprojects:
        dvc_data = 3.18.2
        dvc_objects = 5.2.0
        dvc_render = 1.0.2
        dvc_task = 0.40.2
        scmrepo = 3.6.1
Supports:
        http (aiohttp = 3.13.3, aiohttp-retry = 2.9.1),
        https (aiohttp = 3.13.3, aiohttp-retry = 2.9.1),
        s3 (s3fs = 2026.1.0)
Config:
        Global: /home/pakite/.config/dvc
        System: /etc/xdg/dvc
Cache types: hardlink, symlink
Cache directory: ext4 on /dev/mapper/ubuntu--vg-ubuntu--lv
Caches: local
Remotes: s3
Workspace directory: ext4 on /dev/mapper/ubuntu--vg-ubuntu--lv
Repo: dvc, git
Repo.site_cache_dir: /var/tmp/dvc/repo/2b81ae817a1361d5858ada7fb57a7577

Additional Information (if any):

[skshetry]

We haven't released dvc (or, dvc-data/dvc-objects/dvc-s3) recently. And, I see that you have old s3fs version installed (2026.1.0 vs 2026.2.0).

I see there was a new release from aiobotocore. Maybe check what version you have installed and try installing/reverting it? Also try different versions of botocore.

But it's surprising that it works for dvc pull but not with dvc repro --pull.