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this is my Email ( SKYWE7@GMAIL.COM ) and thank you (^_^) !

hello everyone (^_^) !! please help I bought a DVR and when I wanted to connect it my phone with APP ( ivms 4500 ) and ( hik connect ) its says (Operation failed. The device is added by other users. ) although I have the DVR right next to me with ( verification code and the serial number )...