I've been having issues with baking textures recently and I have no clue how this happened and how to fix this. If anyone has suggestions or solutions I'll gladly accept them. Thanks]1
Try to increase/decrease that parameter before baking: Render - Baking - Ray Distance. Begin with small ray amount - 0.1 or around it. Also, some information from this video also can help: https://www.youtube.com/watch?v=0r-cGjVKvGw
P.S. As i can judge by shape - you unwrapped your mesh properly? Re-check it, just to be sure.