later migration to mongo atlas I can’t persist in the migrated collection (1.6b of documents) through the application, but I can persist in the same database in a new collection, I’m using mongoose as ODM and doing a bulk operator.
these are my connection options in mongo:
{
useNewUrlParser: true,
useUnifiedTopology: true,
retryWrites: true,
writeConcern:{w:"majority",wtimeout:2500}
}