Add an additional default column

[c2006878]

The project table has four default columns, and I attempted to add an additional default column by mimicking the specific details of each of these columns, but I failed. Which file should I modify? Can anyone tell me?

{
"title": "Id",
"column_name": "id",
"uidt": "ID",
"dt": "integer",
"np": null,
"ns": "0",
"clen": null,
"cop": "0",
"pk": 1,
"pv": null,
"rqd": 1,
"un": 0,
"ct": "int(11)",
"ai": 1,
"unique": null,
"cdf": null,
"cc": null,
"csn": null,
"dtx": "specificType",
"dtxp": "",
"dtxs": "",
"au": 0,
"validate": null,
"virtual": null,
"deleted": null,
"system": 0,
"order": 1,
"created_at": "2023-11-22 06:34:59+00:00",
"updated_at": "2023-11-22 06:34:59+00:00",
"meta": null,
"description": null
}