.htaccess is giving me error of page no found

I’m trying to change this url /article.php?title=blog+name&id=1 to /article/blog+name/1

my code is this

RewriteEngine On

RewriteRule ^article/([0-9a-zA-Z.]+)/([0-9a-zA-Z.]+) /article.php?title=$1&id=$2 [NC,L]

thank you very much in advance

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