You get lens flare like that when sunlight is directly hitting the lens, or bouncing inside a [cheap] hood.
Either the hood isn't doing its job properly - 3rd party ones are often far more reflective than the original manufacturer's - or you're just turned too far towards the sun for it to be effective.
A simple in-the-field method to provide additional shade is right there in your left hand… in fact it is your left hand ;)
Hold your hand up & in front of the lens until shadow falls on it - you can't really watch the shadow at the same time as your hand with the camera up to your face, but you will see the flare drop away as you get the position right.
Not part of the question, but - you could back off your exposure time a bit too; that's a bit on the over-exposed side for my liking.
I'd have gone for more like this...
Not magnificent on a small jpg, of course, & neither will it fix the flare, but at least we have some sky.