my insurance is switching me to a biosimilar after a month of humira

I'm worried about this. Should I expect my treatment to basically "restart"? Like would a biosimilar do what humira was already doing and I'll continue to have an increased response with each injection? Or will my body process it as a fully different medication & it's back to square one. I do plan on talking to my doctor and pharmacy team about this but I got this letter when I was already heading out the door to a different appointment.