Code 500 when saving changeset

[HubMiner]

Starting yesterday, when I save, I get a message:

Save changeset
500
[Cancel]

If I retry (Cancel, Save), I get the same message.

The changeset is probably not saved.

[HubMiner]

Chrome console:

[frodrigo]

You got a conflict. There is no implemented way to deal with it in Osmose.

requests.exceptions.HTTPError: 409 Client Error: Conflict for url: https://www.openstreetmap.org/api/0.6/changeset/149224330/upload

Osmose should report about the conflict rather than generic error. Also see #380

[HubMiner]

Confirming the diagnosis: I am able to save changesets when making small changesets (reducing chances of a conflict).