How to change property of SlateJS node element onChange?

Question

How to change Node element property in SlateJS OnChange method?

I have an initial element like before, notice the 'id' property? In OnChange, I want dynamically set the id property. See below for implementation, more or less just SlateJs's basic react setup

const initialValue: Descendant[] = [
    {
        type: 'paragraph',
        id: '',
        children: [
            {
                text:
                    'This is editable plain text, just like a <textarea>!',
            },
        ],
    },
]

Slate React Component

        <Slate
            editor={editor}
            value={textContent}
            onChange={currTextContent => {
                // Logic for newlines
                if (currTextContent.length > textContent.length) {
                    // Same example from slatejs on how to save content
                    const isAstChange = editor.operations.some(
                        op => 'set_selection' !== op.type,
                    )

                    if (isAstChange) {
                        // Set id property of new line
                        currTextContent[0].id = 'test'
                    }
                }

                settextContent(currTextContent)
            }}>
            <Editable
                placeholder="Enter some rich text…"
                spellCheck
                autoFocus
            />
        </Slate>

However, it says the .id property is readonly. The same story happens if I were to try and set the entire object. It's readonly. Adding new properties via currTextContent[0].newID also gives an error, object is not extensible

                    currTextContent[0] = {
                        type: 'paragraph',
                        id: '',
                        children: [
                            {
                                text:
                                    'This is editable plain text, just like a <textarea>!',
                            },
                        ],
                    }

How can I change (or add) SlateJS Node's element property in the onChange method? Is there some function to do this in the Editor class?