Hello everyone,
I am having difficulty transferring the UN contents from an Enterprise GDB to our own SQL Server.
The Dataser copy and paste special into a new empty FGDB ends with this error

Import of an XML Document into FGDB makes this error,

and also into a SQL Server GDB

I'tried to Export Asset Package but...

"unoner" is a db user with sysadmin role...
Where I'm wrong?
Any suggestion is very appreciated. I'm using ArcGIS Pro 2.9.7.
Damiano