Customer getting the error message (Error Message 512)when tried to open the SQL Managed instance database properties from SSMS client?
This error message due to multiple database_guid for the same database_name in themsdb_backupset
you can avoid this error message by deleting the database backuphistory as follow.
msdb.sp_delete_database_backuphistory @database_name=database_name
msdb.sp_delete_database_backuphistory @database_name=db physical id
Azure SQL Database 