Self employed & on medicare. Health insurance is on both schedule A lines (2a + 2c) and on Form 7206 line 1. A double ins. deduction why aren't lines 2a & 2c zero?

I tried to edit Schedule A but I can't remove line 2c (medicare premiums). The only way that I can "fix" the double counting of health insurance is to make line 2a a negative number to "cancel" line 2c. Is there a better solution?