Invalid Command interface/LTE

hello,
why, when i digit this command: interface lte cell-monitor lte1 from here: https://wiki.mikrotik.com/wiki/Manual:Interface/LTE#Using_Cell_lock i take error? my lte is lte1 exactly

up…i beg your pardon..but nobody can help me?..or tell me where can i find the right syntax?

Switch to testing channel.

https://mikrotik.com/download/changelogs/testing-release-tree

What’s new in 6.44beta14 (2018-Oct-01 12:01):

Changes in this release:

*) lte - added “cell-monitor” command for R11e-LTE international modem (CLI only);

i saw..thank you very much..perhaps Mikrotik could specify that the command refers to the beta release in manual… :imp: :imp: