Mi Backup: Don't Delete Old App Backup

[ubaldoemu]

Hi! I get a problem: my mi backup 5gb free space is full, due to the app backup. When I try to delete it, system say me 'sometings went wrong' so don't delete the old app backup. Could I do it from web? I don't have any other backup (eg. Photos)! Thanks

Redmi 2 TD 20140813