Avoid validation problem fot keybinding file

templates/50-keybindings.config.j2

@@ -1,8 +1,9 @@
-set $mod Mod4
-set $left h
-set $down j
-set $up k
-set $right l
+# Keys variables
+{% if sway_keys_variables %}
+{% for v in sway_keys_variables %}
+set {{ v.name }} {{ v.value}}
+{% endfor %}
+{% endif %}
 
 # Dynamic workspace keybindings
 {% for k,v in sway_workspaces.items() %}