Change in MUI rating component affects TextField component

Question

I have a Material UI(MUI) TextField component

<TextField
    error={contents.desc.length > 50}
    required
    value={contents.desc}
    name="desc"
    sx={{ marginBottom: 3 }}
    label="Describe Me"
    fullWidth
    onInput={handleChange}
/>

and a Material UI(MUI) Rating component

<Rating
    name="rating"
    defaultValue={contents.rating}
    precision={0.5}
    sx={{ scale: "1.2" }}
    onChange={(_, value) => {
        setContents({ rating: value });
    }}
/> 

Now, every time I change my rating, the error property in TextField throws an error like Cannot read properties of undefined (reading 'length'). But, that error property alone doesn't generate any error. It works perfectly once the condition is satisfied. I don't know how change in rating is affecting the length property of another component. contents in contents.desc is an object with desc as one of its property.