1.7.5.2 Problem with redirect old urls

[TYCU]

Hello,

I will explain what I need.

My old url is: https://mydomain.pl/producent/make-me-bio/garden-roses-nawilzajacy-krem-dla-skory-suchej-i-wrazliwej-60ml

My new url is: https://mydomain.pl/make-me-bio/garden-roses-nawilzajacy-krem-dla-skory-suchej-i-wrazliwej-60ml

I tried to make redirect in .htaccess file.

Redirect 301 /producent/make-me-bio/garden-roses-nawilzajacy-krem-dla-skory-suchej-i-wrazliwej-60ml
 https://mydomain.pl/make-me-bio/garden-roses-nawilzajacy-krem-dla-skory-suchej-i-wrazliwej-60ml

But when I put new .htaccess on my server I have an server error 500.

Do you have any ideas how to solve it? Maybe I put it in wrong place in htacces file?

Thanks for support,

Regards.