Target table mapping reset after changing datasource

[IvanProtch]

Hello,

I'm experiencing an issue with the Data Transfer tool in DBeaver. When I try to change the source database in an existing export task, the target table mapping gets reset.

Issue details:

• In the DBeaver UI, it is not possible to change the source once the export task is created.
• However, I was able to manually edit tasks.json and successfully change the source.
• The problem is that after modifying the tasks.json file, the table mappings are lost, even though the database schema remains the same.

Steps to reproduce:

1. Create a data transfer task with a specific source and target.
2. Set up custom table mappings.
3. Save the task and verify that mappings are correctly applied.
4. Manually edit tasks.json to change the source database.
5. Open DBeaver and check the task – the mappings are lost.

Expected behavior:

The target table mappings should be preserved even when the source database changes (as long as the schema structure remains the same).