lumpy tortoise shell on a spur thighted mediterranean tortoise

Hello I have a baby 2 year old spurred thighed med tortoise, and her shell is starting to get raised at the top, the bottom of her shell is nice and flat, but the two layers above that are starting to get raised with small lumps, I feed her only weeds,dandelion leaves flowers, honey suckle flowers, plantains, clover flowers and leaves, a little slice of cucumber occasionally, never any protein, and never any other veg or fruit. I thought I was doing everything right. She does eat a lot.

Am I over feeding her?

And also, as the weather has not been to good in the summer she has not spent too much time out in the daylight.

Can you tell me how to stop this growth now, as at the moment it is not too bad.

Is there something seriously wrong with her?

Thank you,
Christina