Filing on Guam with self-employment income. Completed the 1040SS, but also need to file Guam 1040, and it looks like I will be paying SE tax twice.How do I document this?

I have completed schedules 1, 4, SE and C.  The amount of self-employment income is reported in my adjusted gross (for the Guam 1040) - so will be paying tax for that income.  And I'm paying the SE tax for federal 1040-SS.  On the Guam 1040 line 14 "other taxes" asks for the schedule 4 amount as well - which I already will pay to federal.  Guam does not have/contribute to social security - so why am I paying this twice?