db.getCollection("data-sources").find({}).forEach(function(doc) {
   db.getCollection("data-sources").update(
     { key: doc.key },
     { $set: { "data.$[]._meta" : {createdVersionId: doc.versionInfo._id, editedVersionId: doc.versionInfo._id } } }
   );
});

db.getCollection("data-source-versions").find({}).forEach(function(doc) {
   db.getCollection("data-source-versions").update(
     { key: doc.key },
     { $set: { "data.$[]._meta" : {createdVersionId: doc._id, editedVersionId: doc._id } } }
   );
});