Hello wanderwolke,

What user_5359 is refering to is:
Please try to keep the edits within one changeset local (1). Therefore please safe the changes in one country before you move on to the next country. If you spread your changes over a bigger area like in this changeset (see (2)) its not possible to review and check your changes with standard analyzing software any more.

Thanks and best regards
map per

(1) https://wiki.openstreetmap.org/wiki/Changeset#Geographical_size_of_changesets
(2) https://www.openstreetmap.org/changeset/134569774