Shadow Glitch in objects

Does anyone know why is happening this and how to solve it?

302713-glitchy-shadow.png

I get this weird lines where is supposedly be the shadows of my cube and it shouldn’t be like that

Please help

Are you using a moveable skylight?

Thank you ClockworkOcean
Sorry for not replying I already solve it, the problem was something to do with shadow acne and found the solution to adjust the shadow bias property in your light options.