I didn't notice the child's mischief when unlocking the door guard

"I can't open the door because of a child's mischief"

It seems that the door guard was in a halfway position due to a child's mischief when going out.The door guard was locked when I closed the door.

When he got home, he found that the door guard was locked.

There are several ways to unlock the door guard, but this time I chose wire unlocking.There was no defect in the parts, so it can still be used in active service.

By the way, the lock set was NX.CL-50.