What are the potential pitfalls of using incorrect regular expressions in RewriteRule?

Using incorrect regular expressions in RewriteRule can lead to unexpected behavior or errors in your website's URL rewriting. To avoid this, it's important to carefully test and validate your regular expressions before implementing them in RewriteRule. Make sure to escape special characters and properly define the pattern you want to match.

RewriteEngine On
RewriteRule ^products/([0-9]+)/?$ product.php?id=$1 [L]