an error is reported when using SQLite.swift to use try db.run on existing database tables (table.addColumn (title)) adds a title column.

the code is as follows:

/ / create a table

private func creatTable(filePath: String) {
    do {
        db = try Connection(filePath)
        
        try db.run(table.create(ifNotExists: true){ t in
            t.column(statusId, primaryKey: true)  //
            t.column(statusText)
            t.column(userId, unique: true)  //
            t.column(createTime)
        })
        
        try db.run(table.addColumn(title))

        print("")
    } catch {
        print(": \(error)")
    }
}

error log:
failed to build table: duplicate column name: title (code: 1)

by looking at the database under sandboxie, the title column has been added, and the data title column you just added is also valuable

it should be my wrong use of addColumn, and please give me some advice.