The edit form keeps old values after submit

[sgmv]

The edit form keeps the old data after sending an update. But it should be flushed. All possible fields should be empty.

The current situation affects it like you have a one update time for all possible statuses:

{
	"0": {
		"id": 643,
		"title": "test description and updates",
		"description": "the description for test",
		"impact": 1,
		"components": [
			154
		],
		"start_date": "2025-07-28T12:40:00Z",
		"end_date": "2025-07-28T13:07:27.303Z",
		"system": false,
		"type": "incident",
		"updates": [
			{
				"status": "analysing",
				"text": "change status to Analysing",
				"timestamp": "2025-07-28T13:07:27.303Z"
			},
			{
				"status": "detected",
				"text": "The incident is detected.",
				"timestamp": "2025-07-28T12:48:09.886442Z"
			},
			{
				"status": "fixing",
				"text": "change status to Fixing",
				"timestamp": "2025-07-28T13:07:27.303Z"
			},
			{
				"status": "observing",
				"text": "change status to Observing",
				"timestamp": "2025-07-28T13:07:27.303Z"
			},
			{
				"status": "resolved",
				"text": "change status to Resolved",
				"timestamp": "2025-07-28T13:07:27.303Z"
			}
		]
	}
}

How to reproduce it: edit an event, edit it and submit. Then push the edit button again, and you will have predefined values.