Default security AdminSDHolder

Hi,

For reasons still undetermined, security on the AdminSDHolder object has partly disappeared...I don't have backup to allow me to restore the object (the issue date of 2013)

How can I recover/restore "good" default security on the AdminSDHolder object? (as for a new installation...)

If possible, what is the impact?

(Excempt that will propage security set on the AdminSDHolder to all accounts and groups called "protected" through the process SDPROP)

Best regards,