Fatal error: Smarty error

Fatal error: Smarty error: [in common_templates/product_data.tpl line 669]: syntax error: unclosed tag {if} (opened line 66). (Smarty_Compiler.class.php, line 316) in /var/www/vhosts/mysite/httpdocs/lib/templater/Smarty.class.php on line 1095

I did modify product_data.tpl, but I also just restored it from the repository, yet the problem remains.

can anyone help?

resolved, for some reason it worked the 2nd time