### Font Awesome conflict:

My away to use different versions of FontAwesome was changing the 'font-family'/'font' at css.

Examples:

.fas{font-family: "Font Awesome 5 Free";}

.fa{font: normal normal normal 14px/1 FontAwesome;}

i.fa.fa-linkedin {
    font: normal normal normal 14px/1 FontAwesome;
}

The best way is just use just one version of Font Awesome