If you've ever tried to register the repeater, it should first reset.
Resetting the repeater:
At first it must be disconnected
Reconnect it to 5 seconds and disconnect it
Reconnect for 35 seconds and disconnect
It is reset after the operation and for now it should be left unplugged and first put the base in registration mode. You will do it with a long press of 5 seconds on the Registration button on the base. The base is in registration mode for one minute. Then plug your repeater. The small left light flashes. This means that the repeater tries the database. As soon as the light turns on permanently, it means that it has registered. Sometimes the repeater needs a little more time for registration. If after a minute it is not registered, it would put the base in registration mode (long press on the registration button).
And since it works perfectly.