I often hear these mistakes made by German speakers who are learning English.
They say: We need to discuss about the project.
The problem here is with the verb to discuss. This verb means to talk about something. Therefore, the word ‘about’ is not needed in the sentence as the meaning is already covered by the verb.
Correction: We need to discuss the project.
Alternatively we can say: We need to talk about the project.
Have fun learning English!
Louise