updating prior_node field when added into collection_set
updating prior_node field when added into collection_set

gnowledge/gstudio,gnowledge/gstudio,AvadootNachankar/gstudio,gnowledge/gstudio,AvadootNachankar/gstudio,gnowledge/gstudio,AvadootNachankar/gstudio,AvadootNachankar/gstudio,gnowledge/gstudio