Technical inspection is required for all vehicles older than 3 years and is a legal requirement to renew Istimara, usually the insurance is renewed before the technical inspection, in your case the Istimara is expired long before the insurance, therefore, and the insurance company wants to make sure the car is in a good condition before they renew your insurance policy. You got to do it either before or after renewing the insurance document so, do not worry go for it.