Customize field and Edit Doctype Field Issue

I have custom app name = custom_erpnext
I clone the app from the TODO doctype and I did some modifications i create a field
name : project_manager in customize form after that I realize Edit Doctype is that correct option then i delete project_manager from the customize form side and add the same field in Edit doctype i save the code in git hub if get the code from git and install in another system the deleted project manager in customize is repeate two times

what i do?