Fixed prefix command

commands/prefix.js

@@ -69,7 +69,7 @@ exports.run = async (client, message , args, connection) => {
                     return;
                 });
                 return;
-            };
+            } else {
                 connection.query(`UPDATE prefixes SET prefix ='${args[0]}' WHERE guild ='${message.guild.id}'`, function (err) {
                     if (err) {
                         throw err;
@@ -78,6 +78,7 @@ exports.run = async (client, message , args, connection) => {
                 message.channel.send('Updated prefix.').catch(() => {
                     return;
                 });
+            }
         };
     };
 };