Can you please explain to me what " You can only upgrade to the EU firmware after update" means? I want to revert to the older "international" firmware cause i'm having issues with the current...

Model : TL-WA901ND Hardware Version : V4 Firmware Version : TL-WA901ND(EU)_V4_160304 ISP : Greetings I recently installed the latest firmware for TP-Link WA901ND v4 but it turned out to be the EU...