Why is Sequelize's save() not saving the changes that I've pushed to the JSON but saving everything else?

I'm making a function which will save the messages of my chat app to the database. It looks a bit like this:

let Server = require('../models/Server')

module.exports.sendMessage = (req, res, next) => {
    let serverRoom = req.body.serverRoom
    let serverId = req.body.server.id
    let server = Server.findByPk(serverId).then(result => {
        console.log(result.rooms[serverRoom].history)
        result.rooms[serverRoom].history.push('Hi')
        result.name = 'Test1'
        console.log(result.rooms[serverRoom].history)
        result.save();
    })
    .catch(error => {
        console.log(error)
    })

    res.status(200).json({
        message: 'Success'
    })
}

The server has a JSON column which contains an array of objects which have a history property which is an empty array. In my code, I console.log() the history of room with index of 0, then I push a message 'Hi' to the history of that room and then I console.log() the history again to check if the message was pushed. The console.logs prove that the message was indeed pushed, however, when I try to save() the object to the database, the JSON changes do not save.

However, the name of the result which I also change to 'Test1' in the code actually changes in the database, so the save() function is working but without saving the JSON changes. Any clue why is that happening?