Please reset all settings of your's device in general management settings then try to it's again. If you like please accept as a solution it's help to others users also, click on 3dots in my reply section and click on accept solution. Thanks.
As per your query, we want to inform you that this is the concept of the devices, Under the security and privacy the notification/ suggestion showing on device to recommends to update the device for device security. If update available then you can update the device or if your device is up to date then you no need to take worry. However, If you have other concerns regarding Samsung products kindly feel free to get in touch with us.
