Time diffirent between pages in each session

[Anonymous]

Hi,
I have a table like in the picture:

In each session, a user visits a few pages
How can I calculate the average time between pages in each session?

I try:

AVG_Time =

AVERAGEX(

ADDCOLUMNS(

FILTER(

SUMMARIZE(

FactEvents,

'FactEvents'[Date/Time],

FactEvents[SESSION_ID],

FactEvents[Page]

),

'FactEvents'[SESSION_ID]=max('FactEvents'[SESSION_ID]) && 'FactEvents'[Date/Time]<=MAX('FactEvents'[Date/Time])&& 'FactEvents'[Page]=MAX('FactEvents'[Page])

),

"diff",DATEDIFF(MIN('FactEvents'[Date/Time]),MAX('FactEvents'[Date/Time]),MINUTE)

),

[diff]

)

but this not work (

[amitchandak]

@Anonymous , Create a new column like

new column =
datediff(maxx(filter(Table, [session_id] = earlier([session_id]) && [page] = earlier([page])), [Date/Time]), [Date/Time], second)

[Anonymous]

@amitchandak 
Something is wrong with the code