Not a good combination! The black-white-red flag is of the rightists, nowadays still used by the “Reichsbürger” movement, which is very back warded and regressive.

This to mix with the GDR symbol is a very bad idea. That’s mixing fascists with communists. The black-red-yellow flag comes from the Wartburgfest (1817 students’ convention) and then was the official flag of the Weimar Republic 1918-1933.

Please do not mix that, it’s an affront against all the progressive Germans!