Scene objects not deleted on other clients devices

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When I try to delete scene objects created by master client , they are deleted on master client's device, however, some of them are still seen on other clients devices. This is my codes.

if (PhotonNetwork.isMasterClient) {
PhotonNetwork.Destroy(go66); <= this is deleted on master, not deleted on other clients.
PhotonNetwork.Destroy(go6); <= this is deleted on master and other clients.
}

One thing,,, go66 used to be a child of go6 when it is created. Later go66 is released before getting destroyed.

Can anyone help me on this? Thanks for any advice.