Hmm, just took a quick look at a few of the offending nodes, and they seem to all have been created by autoAWS 4-5 days ago even though the existing node was never touched. So somehow autoAWS concluded that nodes with those osak:identifier values didn't exist. 

Sorry for this mess. But please ping me/autoAWS account directly next time autoAWS causes troubles.

I have disabled autoAWS for now until we have a better understanding of what happened.

Examples:
* Glostervej 9, Valby: existing node https://www.openstreetmap.org/node/4960384498, new node https://www.openstreetmap.org/node/12950070726
* Granvænget 2, Karlslunde: existing node https://www.openstreetmap.org/node/340792644, new node https://www.openstreetmap.org/node/12953241205