There is an admin-level 6 overlap on relations 1692123 and 1702215. As such, https://osm.wno-edv-service.de/boundaries/ and other systems not allowing overlap only show one or the other. It would be better to have the overlapping part associated only to one. Wikipedia might be of help there. I assume the overlap does NOT belong to 1702215.
https://upload.wikimedia.org/wikipedia/commons/4/4e/Moldova_harta_administrativa.png
Thanks for update (I'm only user, not mapper myself and may mess more than I'd do good)

This is a single level 7 admin boundary missing in Zenica-Doboj area, but to make things complicated, from parts of the municipality (and parts of Doboj, the new municipality of Usora was created. http://en.wikipedia.org/wiki/Usora_Municipality

According to BA statistics, Istočna Ilidža has it's own municipality with associated population and I can't associate the administrative boundary on this. Any help appreciated.

osm.org/directions?engine=osrm_car&route=37.9313%2C12.3274%3B38.1765%2C13.0917#map=16/37.9315/12.3349&layers=N

No route to Sicily Likely a ferry error, misconnection between street and ferry, either here or on Sicily end of the ferry(/ies)?

Relation ID 3826856 (Saky, admin-level 6) is dupe with 2866058 (same). I recommend to merge 3826856 into 2866058.

OSM relation/2516278 incorrectly designated as admin-level 6, conflicting with 2875223 (correctly admin-level 6) 2516278 must be changed to proper admin-level 8 - but the boundaries do not match the surrounding boundaries, as such it might not qualify for an admin-level at all?
I recommend to remove admin-level for 2516278 completely until more accuracy is available.

According to Russian Wikipedia, OSM relation/5396624 Бурштинська міська рада (admin-level 6) is part of OSM relation/1741639 (Halych Raion, also admin level 6). Please expand OSM relation/1741639 and change OSM relation/5396624 to lower admin level. Thank you.

According to stats.dk Christiansø is a own municipality (stats.dk-ID 411). According to Wikipedia, the "municipality" also covers Frederiksø, Græsholm and Østerskær. If someone could kindly create a admin-level 7 boundary?

relation/5176035 (Christiansø only)
https://en.wikipedia.org/wiki/Ertholmene (redirected from Christiansø)
http://www.statbank.dk/statbank5a/SelectVarVal/Define.asp?MainTable=FOLK1&PLanguage=1&PXSId=0&wsid=cftree (official population statistics containing Christiansø)

relation/347871
Eurostat refers to Montserrat, which is also the name of the main township. Wikipedia (spanish) says: Monserrat (en valenciano y oficialmente, Montserrat)
So I assume the municipality name (admin-level 8) must be changed to Montserrat with a t after the n, though it might be wise to add alternate name Monserrat.

6075191 is not properly associated to Kyiv Oblast (71248).
6075191 was dupe with 2190496 which has been changed to admin-level 9 (was 6).
ukrstat.org ony refers Обухівський район which is 1745149 and does NOT contain a separation for the city.
As such, I recommend to delete (merge?) 6075191 as dupe with . I also recommend to leave 2190496 as admin-level 9. But then 1745149 shall be changed to cover the former 2190496 region as well (which is inside it's boundaries.