Hi Andreas,
From what I can see, you can not set the object ID (assuming this is what you mean with the object GUID), owner, changed by, changed date and created date using the importer. I myself is not completely sure how Mendix generates their object IDs.
I have in the past tried to mess around with it (creating a couple of thousand entities using PostgreSQL), however, when you want to use or add data it usually resulted in errors (for me at least).
Based on your time and constraints, you can perhaps build a type of ETL importer to import your associations using some sort of UID. However, I don’t believe you will get the same object IDs in your new system
Hi ,
You can use database replication module to migrate you date and the below is the market place URL :
https://marketplace.mendix.com/link/component/160
and please check the bellow link for more information about the module :
https://docs.mendix.com/appstore/modules/database-replication