Production Name error

I created a glyph called falellah then duplicated it with ss05 suffix to make other option with different dots shape but when export the font this error appears:



How to solve it?

Select the ss05 glyph, choose Edit > Info for Selection (Cmd-opt-i), and in the dialog that appears, uncheck all checkboxes, especially the one for production name and Unicode.

It was already unchecked, but also the original was. I checked then unchecked boxes for the original then everything went well I do not know what’s happen exactly.