@briony1 is this a recent change to your crab ratio or something that has been building slowly.
If it is a recent, short term thing, I would be looking at causes such as whether your insulin is working correctly. I would change my insulin and pen.
It may be time to do a basal test because our needs do change.
Is the high insulin having any other impact on your life? If not and it is what you need, then there is no need to stress - we are all different with different lifestyles, needs, etc..