How can we modify Out of box subflow if its on read only mode

[Jyoti33]

How can we modify Out of box subflow if its on read only mode. how to remove the read only mode?

[Dimple1107]

I have copied the subflow but i am not able to deactive the OOB one so that i can use the custom copy of that 

[Dimple1107]

@Aman Kumar S