Gridview with crud

#1

I just am trying this flow
https://flows.nodered.org/flow/e32f2b942bce77ef6079c0642b93c036
I am able to insert records in Mangodb but Update and delete fails though i do not get any error message.
Is there something missing in this flow.
Any help will be appreciated. I am looking to use this flow to create a frontend for timers.

Thanks