Sentry: Can I refer to a previously sent event?

When I have sent a custom Sentry event,

• Can I update it later ?
• Or can I refer to it in a new event, so that the Sentry Dashboard knows they are related ?

E.g. if the server doesn't respond for a long time, I want to send an event to be aware of potential problems. Obviously I can't send an event if the server doesn't responde ever.

But if the server does respond finally, I would like to kind of update that previous event to something like "This still took too long, but at least the server did respond after 27 seconds (and the user didn't go away)".

E.g.:

First event should be something like:

sendSentryEvent({
    eventId: 'c0e3e4fa-df19-43a5-825a-6c4da1362c56',
    message: 'no server response for 15 seconds'
});

Second event should be something like:

sendSentryEvent({
    eventId: '(actually dont need an event id in other cases)',
    relatedId: 'c0e3e4fa-df19-43a5-825a-6c4da1362c56',
    update: 'still took too long, but at least the server did respond after 27 seconds',
});