The answer to 'stone walkway erosion' is that it is a common problem caused by factors like heavy foot traffic, water runoff, and freeze-thaw cycles. Symptoms include uneven, cracked, or sunken stones, and weeds growing between the pavers. To solve this, you'll need to address the underlying causes through proper maintenance and repairs.
If the erosion is minor, you may be able to DIY the fix by resetting loose stones, adding new gravel or sand, and sealing the walkway. But for more extensive damage or if the problem keeps recurring, it's best to call in a professional landscaper. They can properly assess the issue, make any necessary structural repairs, and install a long-lasting solution to prevent future erosion.