About 2 properties in1 booking.com account


I'm the one {Oneli Silva} created these both properties accounts ( properties ids Luthmin River View -  594046 & Ray-Kos Bungalow - 8148089). So now Luthmin River View (594046) need separate from my join property group because property is selling & new owner asking there booking.com account for themselves. I would like to hand over there assets. But my logging id & password is same for both properties. Then I can't give my personal password to the. Please help me do divide 2 proprties for 2 passwords. My logging is is raykosbungow@gmail.com for both properties. I need chnage logging id for Luthmin River View (594046)