I am getting elementary desktop in my unbuntu

I am getting this in my unbuntu 16.04 and unable to update from 16.04 to 18.04

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kp@kp-HP-Notebook:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	elementary
Description:	elementary OS 0.4.1 Loki
Release:	0.4.1 
Codename:	loki

You’ve obviously been playing with Elementary OS.

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