Hi @Carlman !
One of 2 identical albums released in the same year are tagged with EXPLICIT or E.
Explicit content warnings like an “E” for “explicit” or the parental advisory logo serve to notify music listeners of content that may be inappropriate for kids. This content includes strong language or depictions of violence, sex, or substance abuse.
The listener has the option to choose which album he wants to listen to (with or without the E mark) or in the Deezer settings he can select Hide explicit content .
How to filter explicit content on Deezer
https://support.deezer.com/hc/en-gb/articles/360000590898-Explicit-Content