Changing Permanent Links Will Affect SEO ?

hey i used to have my post urls like this
www.blalba.com/2019/55/4/postname
now i removed the date from this links (changed the settings from wrodpress )
is that will affect seo coz search engines archived the urls that contains dates

I think your SERPs may become lower (but temporarily). There are many factors on which depends on how quickly Googlebot re-indexes posts.