127.0.1.1 in /etc/hosts

[Stuart McGraw]

What is the meaning of the line:

  127.0.1.1  mymachine.xxx  mymachine

in my /etc/hosts file?  It was put in there by a Xubuntu-17.10
install (or to be more accurate, an Ubuntu server-17,10 + Xubuntu
package install.)  I am installing some backup software (bacula) 
which for reasons I haven't delved into, dislikes (as in breaks) 
when it resolves "mymachine"s address and ends up with 127.0.0.1 
which is what happens when the above line is present in /etc/hosts.  

Will I break something else if I remove or replace the line 
with the machine's "real" ip address which keeps bacula happy, 
eg:

  10.10.200.85  mymachine.xxx  mymachine

?  Thanks...