Is it possible to delete the entire previous message by bot ?

Currently bot has option to show welcome messages for the new new_chat_members which shows for each member. There are plenty of welcome messages staying in group due to the high volume of new members. iIt is bit irritating for the current users showing multiple number of welcome messages.

const welcomeMessage = (ctx) => {
  const { new_chat_members } = ctx.message;
  const newMembers = new_chat_members.filter( member => member.is_bot === false)
  var membersName = newMembers.map( usr =>{ 
    let fullname = [usr.first_name,usr.last_name].join(" ");
    return fullname;
  });
  ctx.replyWithMarkdown(`Welcom ${membersName.join(', ')}`);
}
bot.on('new_chat_members', welcomeMessage);

Is there any option to delete all the previous welcome messages ?

[Piterden]

const newChatMemberHandler = async (ctx) => {
  const names = ctx.message.new_chat_members
    .filter(({ is_bot }) => !is_bot)
    .map(({ first_name, last_name }) => `${first_name} ${last_name}`)

  await ctx.deleteMessage()

  ctx.replyWithMarkdown(`Welcome ${names.join(', ')}!`)
}

bot.on('new_chat_members', newChatMemberHandler)

[Piterden]

const { message_id } = await ctx.replyWithMarkdown(`Welcom ${membersName.join(', ')}`))
setTimeout(() => ctx.deleteMessage(message_id), 60 * 1000)
console.log(message_id)

I affraid we talk about the service welcome message.