File already exists error with sync

[cecilia-donnelly]

A user has reported that some files are erroring with Failed to copy: Update Create failed: sftp: "This file already exists on Permanent.org. Editing exiting files is not supported." when they sync their local to Permanent. Since they pass the --size-only and --sftp-set-modtime=false flags as suggested in #80, this shouldn't be happening.

[slifty]

@cecilia-donnelly one way this could be happening even with those flags are if the sizes are different

The difference in file size could be that (A) the file has been modified locally or (B) somehow the file was not uploaded properly in the initial sync.

A next debug step would be to have the user download the file in question from permanent and compare the permanent version with their local version.