If this is the first installation of the xiaomi.eu ROM then definitely not.
If you just want to update from xiaomi.eu to a newer version of xiaomi.eu ROM then you don't need to wipe anything, just update.
Installation instructions xiaomi.eu Install drivers, ADB and fastboot install Xiaomi drivers 1- First, update the ROM to the latest using the updater. 2-Unlock the bootloader https://xiaomi.eu/community/threads/unlock_hyperos_-global-devices.71752/post-720918 3 -Download the ROM : Stable...
xiaomi.eu