One thing to keep in mind though is that both schizophrenia and dementia affect the same section of the brain. However, if the patient has late onset schizophrenia (after the age of 40), the likelihood of impending dementia is increased. The likelihood for Alzheimer's remains the same however as the general population.
This is because the watch is not making allowances for Daylight Saving Time (summertime). Change the watch's DST setting* to Auto DST, and it will adjust the hour setting automatically. Note that you should turn off the DST setting if you are in an area where Daylight Saving Time (summer time) is not used.
That gets you past the error message, and lets you change the date and the time. However, attempts to change the time zone will fail silently, with no error message. To change the time zone, you need to change the permissions on this registry key: