Session Management in Okta with React/Spring Boot

Hi There,

We have recently migrated our application from Keycloak to Okta.
And we have observed that sessions are not handled properly after migration.
I would like to achieve the following thing - " After logging in successfully, user should be automatically kicked out the previous login. If user try to login from different browser he/she should be active only per session.
My application is using React in Front end and Spring Boot, Webflux security at Backend.
I have tried couple of solution from my side and those are not working.
Can you please help me on this.