Use Telink BLE MESH. I know that i need to enter mesh_name and mesh_pwd for mesh connection.
Below are the settings for "MESH_NAME" and "MESH_PWD" in the user_config.h file.

#define MESH_NAME "telink_ble1" //max 16 bytes
#define MESH_PWD "1234"

Among the functions of telink mesh android app, there is a function to change "MESH_NAME" and "MESH_PWD", so I changed it to "telink_ble2" / "12345", respectively. Then, it was confirmed that the name and pwd of the devices connected to the app were changed.

Q. So the current "MESH_NAME" and "MESH_PWD" of devices connected by mesh have been changed to "telink_ble2" / "12345", respectively. I'm trying to add a new device in this state. The new device's "MESH_NAME" and "MESH_PWD" have default values of "telink_ble1" / "1234" and will not be registered in the app. How can I register this?
If the name and pwd on the app are telink_ble1 / 1234, you can see new devices, but you can't see the devices that changed the name and pwd.