Photography

It's bloom, and while we typically think of this as coming from objects casting illumination in the shot (like light fixtures) it can also be caused by objects in the shot being overexposed, like the yellow fabric in the foreground in your picture. Highly illuminated and overexposed objects will bleed out into surrounding areas which are most visible in portions of high contrast, and this cannot be fully escaped because lenses are physically incapable of being perfect and not all of the photos entering your camera will be kind enough to do so in ordered lines perfectly perpendicular to the front of the lens.

Quite a wide swath of that object turned out pure white, 255/255/255, which I discovered by stabbing it with my eyedropper tool. Since whatever-it-is is actually yellow in reality, your exposure settings were too bright for that particular object and how it was illuminated.

I'll point out that 1/100 is an incredibly slow shutter speed for a subject illuminated by sunlight, even for an old and crusty camera operating at low ISO.

Fixes:

• Use a shorter exposure or smaller aperture. This will possibly underexpose the background. You could then try mitigating that a bit in postprocessing.
• Compose an HDR shot by taking a long and a short exposure shot of the same thing, and composite them together (or let your camera do it for you if it's capable).
• Live with it, it's just how cameras work. Revel in the beauty of the flaws/in the film days you didn't have much of a choice/kids these days don't know how great they really have it/get off my lawn/et. cetera.