Sliding door's wheel scratching paint issue

[somed84]

Hey everyone

The lower wheel (the white one) on the sliding door is scratching the paint,the result is a long and big white line as wide as the wheel (the photo is not clear,i know)

How can i resolve it?

Thanks to everyone

 

[TripleBee]

Try to find out the reason why it does. Is you sliding door still aligned? Check when closing if the door lifts up on the hinge in the middle.
Otherwise you could start with aligning the lower slider upwards.