It is common in many people to have higher fasting sugar level than the PP sugars due to higher liver
output of glucose
during the overnight fast.
In your case you are totally safe as far as diagnosis of diabetes
is concerned. Yearly or two yearly check up of sugars with HbA1c is more than enough for you to keep a watch.
In case you put on weight or become very sedentary in lifestyle or if any stress
bothers you then in future there is a chance of having higher fasting sugar levels compared to your PP sugars as it is a sign of more insulin resistance
in people genetically prone to have diabetes.
Hence take care of your general health and use preventive measures to avoid diabetes in you. Take care.