How to push a firmware on a CPE

I’d like to push an npk file to update the firmware of my mikrotik CPE.
But when I upload it as an firmware update, I got the error:

“Too big file. Is it really XML describing MikroTik packages? URL:
I don’t know what to put in my xml file. What can I do to upload this file?
Thanks in advance

See this: Manual:TR069-client - MikroTik Wiki

see my guidance at TR069 with GenieACS v1.2.3 (Step-by-Step) - MikroTik