Renamed files with .sql extension

[bread]

Hello everyone,
I'm facing a little problem when I sftp sync my .sql databases from debian to windows
The bases are systematically renamed

EX: I have tried several ways of naming
2020-09-08_BDDFlarum.sql
2020090812:25:01_BDDFlarum.sql
Tuesday, September 8, 2020, 16:14:01 (UTC+0200)_BDDFlarum.sql

but every time I sync up I end up with files named
MFOA6A~V.SQL
1MLSP4~2.SQL

This is only true for .sql files, the other files are copied correctly.
The log files are correct, "finished successfully".

What can I do to avoid this

Thank you