Whatsapp business API webhook sends multiple responses

I am creating a whatsapp business api app that replies to whatsapp messages with a messages I have received from my API. However, it is triggerring multiple times after the initial messages has been sent.

app.post("/webhook", (req, res) => {   // Parse the request body from the POST   let body = req.body;   // Check the Incoming webhook message   console.log(JSON.stringify(req.body, null, 2));   // info on WhatsApp text message payload: https://developers.facebook.com/docs/whatsapp/cloud-api/webhooks/payload-examples#text-messages   if (req.body.object) {     if (       req.body.entry &&       req.body.entry[0].changes &&       req.body.entry[0].changes[0] &&       req.body.entry[0].changes[0].value.messages &&       req.body.entry[0].changes[0].value.messages[0]     ) {       let phone_number_id =         req.body.entry[0].changes[0].value.metadata.phone_number_id;       let from = req.body.entry[0].changes[0].value.messages[0].from; // extract the phone number from the webhook payload       let msg_body = req.body.entry[0].changes[0].value.messages[0].text.body; // extract the message text from the webhook payload      axios({     method: "POST",     url: API_URL,     data: {       id: phone_number_id,       question: msg_body,       email: "N/A",       conversation: [],       save: true,       resolved: "N/A",       ads: 0,     },     headers: {       "Content-Type": "application/json",       "x-api-key": process.env.API_KEY,     },   })     .then(apiResponse => {       if (apiResponse.status !== 200) {         throw new Error(`Request failed with status ${apiResponse.status}`);       }       return apiResponse.data;     })     .then(responseData => {       console.log(responseData);        axios({             method: "POST",             url: END_POINT_URL             headers: {               "Content-Type": "application/json",               Authorization: TOKEN,             data: {               to: from,                type: "text",               text: {                 preview_url: false,                 body: responseData.answer,                },               messaging_product: "whatsapp",               recipient_type: "individual"             },           })           .then(() => {             // Confirm the message has been sent             res.status(200).end();           })           .catch((error) => {             console.error("Error sending WhatsApp message: ", error);             res.status(500).end();           });     })     .catch(error => {       console.error(error);       res.status(500).json({         message: "An error occurred while chatting.",       });     });     }       }  }); 

I have tried debugging but to no avail, sometimes the messages are sent at super random periods too