Erasing the speakers from your account (which can only be done by registering them to a different account) will not have any impact on your system.

Without knowing what kind of problems you have I can say that often problems are network related.

Start with a system refresh in this order: Power off all Sonos devices, reboot your router and wait until the router has fully restarted, then power up Sonos, starting with any wired Sonos if any.

Check if you have wifi interference https://support.sonos.com/s/article/3286?language=en_US

Thank you, its really appreciate. Now everything is working  :0)