Espace 4 Radio Error: Correct Code Entered, Works Fine on Second E4

Hello, I have a problem with the radio in e4. After entering the correct code, an error pops up. I transfer the radio (changer) to the second e4 and everything is fine. To sum up two radios, two good codes in one e4 go in the other after entering the error code.

In the Cabasse Auditorium factory set in Espace 4, the radio and changer codes are identical and if the correct code is entered, both segments are activated simultaneously. If you move the changer to another car and enter the changer code, the radio will reply "ERROR", while if you enter the receiver module code, it will show "CD Code".
If you want to achieve success, you would have to translate into your car both segments from the one in which "everything is fine"

Haven't you pushed something?

A similar problem is quite clearly described here:
https://www.elektroda.pl/rtvforum/topic3358814.html

As I understood correctly, the radio and the changer have separate codes. In the event that someone previously replaced the changer, I will have two codes. I'll check it tomorrow and let you know

Thank you for your help. Problem solved. If it was changed with the changer, we say to have the radio code and the changer code. The radio module in my version is in the storage compartment on the left side of the trunk.