SMS triggers check are from the client side only,

that is under care of the user. It is simple to reach a situation where

from the server side, triggers are no more valid, and related task ramain indefinitively queued.

To prevent that, ecFlow triggers check is more robust:

  - triggers have to be consistent from the client side.

  - 'extern' can only refer to an external suite

  - server can be requested to confirm that all triggers are referring to an existing node,

    in the loaded suites