Hi. I have seen recently that several turn constraints have been wrongly created, adding intermediate nodes next to intermediate ways as “via” members.

This is unnecessary and gives errors in the validators since in these cases only the intermediate via without the respective nodes should be added to the relation. The node should be added only when there is no intermediate via as a member.
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For better editing of turn constraints, I recommend using the iD web editor at first.

Greetings.

https://wiki.openstreetmap.org/wiki/Relation:restriction#Members