You would have had to do that if you added more than 1.0kW of solar, as @miimura said. People on NEM1 who have made no changes to add additional panels are still on it, for the 20 years from when they signed up (unless something completely wipes away all NEM agreements which has not happened.
On that note, to anyone lurking in this thread... please contact your local lawmakers to let them know how you as one of their constituents are against AB 1139... which would wipe out NEM 1.0 and 2.0 grandfathering.
AB 1139 (Gonzalez) Amendments Make Bad Bill Worse — CA Solar & Storage Association
Assembly Bill 1139 (Gonzalez) would bring California’s rooftop solar and storage market to a screeching halt, slowing the state’s clean energy progress while harming low income solar users, businesses, and jobs. AB 1139 would: Make going solar more expensive for every rat
calssa.org