It seems to be very unlikely the source was 'observation' for any of.those specific edits. So at least those changesets should be reverted completly.

Am 13. November 2021 22:05:38 MEZ schrieb "Raphael Das Gupta (das-g)" <lists.openstreetmap.ch@raphael.dasgupta.ch>:
Hi Raphael

On 13.11.21 21:50, Raphael wrote:
A user recently deleted apparently all post offices in Switzerland and
then readded them adding postid, suspicious survey:date and (in my
opinion redundant) operator:<language code> tags, see e.g. this
changeset [1]. Thereby, not only the version history has been deleted,
but also information got lost: for example post_office=post_partner
tags on shops were replaced with separate amenity=post_office nodes.
Ouch. Thanks for making us aware of that.

Has this has been discussed anywhere?

Not that I'm aware of. So probably neither on this list, nor at the
Zurich "Stammtisch" meeting.


Unfortunately, the user that did these edits does not reply.

:-(


I propose to revert these edits.

Seconded.


However, as there are so many, i don't know if this is even possible.

As long as there aren't any conflicting subsequent edits of the affected
objects, it should be possible.

Kind regards,
Raphael (das-g)
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