Target the area where you keep making the mistake. Slow down and just play a short section (a couple of bars) before where the mistake happens and then a short bit after.

Do this at whatever speed you can manage without making mistakes, then build up to the right tempo.

Then try playing the entire song.

The route to insanity is repeatedly playing all the way through a piece, reaching where mistakes happen, making the mistakes, then playing on to the end. This wastes time and achieves little