Update an existing monitors relation.<br><br> To execute this query, the user must be a member of an authorizing role which satisfies both of the following conditions: <ol> <li> One of the following role-related conditions is true: <ul> <li> The authorizing role has *direct or indirect* deviceManagement rights for the role from which the monitors relation is updated </li> <li> The authorizing role has *indirect* roleManagement rights for the role from which the monitors relation is updated </li> </ul> </li> <li> The authorizing role has monitorManagement rights for the device to which the monitors relation is updated </li> </ol>