Teams Recurring Meeting Update Issue with Graph API

[Thesiva7]

I successfully created a recurring Teams meeting using the Graph API.
After that, I updated the entire recurring series using the Graph API, which worked successfully.
I then tried updating a single instance of the recurring series using the Graph API, and that also succeeded.

However, once I update any single instance of the recurring series, any subsequent attempt to update the entire recurring series results in a 500 Internal Server Error from the Graph API.

Below is the code snippet I’m using to update the meeting in Node.js:

process.env.teamsScheduleMeeting = "https://graph.microsoft.com/v1.0/me/events"

const headers = {
    'Authorization': `Bearer ${token}`,
    'Content-Type': 'application/json',
    'Prefer': `outlook.timezone="${payload?.timezone ? payload?.timezone : payload.booking.timezone}", outlook.body-content-type="text"`
};

const meetingData = {
    ...(payload?.title && { subject: payload?.title }),
    ...(payload?.startTime && payload?.endTime && payload?.timezone && {
        start: {
            dateTime: new Date(Number(payload?.startTime)).toISOString(),
            timeZone: payload?.timezone
        },
        end: {
            dateTime: new Date(Number(payload?.endTime)).toISOString(),
            timeZone: payload?.timezone
        }
    }),
    ...(payload?.recurrence && { recurrence: payload.recurrence }),
    ...(payload?.participants && Array.isArray(payload?.participants) && {
        attendees: payload.participants.map(email => ({ emailAddress: { address: email } }))
    })
};

const teamsMeetingUpdateUrl = `${process.env.teamsScheduleMeeting}/${payload.type === "recurringInstance" ? payload.instanceId : payload.eventId}`;

const existingEventDetails = await axios.get(teamsMeetingUpdateUrl, { headers });
const existingContent = existingEventDetails?.data?.body?.content;

if (payload?.description) {
    // Update the body content only if a new description is provided
    meetingData.body = {
        contentType: 'text', // Retain original or default to text
        content: existingContent.replace(/^(.*?)(\r\n|$)/, `${payload.description}$2`) // Replace first line with the new description
    };
}

const updateEvent = await axios.patch(teamsMeetingUpdateUrl, meetingData, { headers });
console.log('updateEvent---', updateEvent);

Can some one help me understand why the Graph API fails with a 500 error when updating the entire series after modifying a single instance?