Purdue申请材料要求提交diploma？？

International Students only: Submit a copy of each diploma received in original language and English translation to the Department of Statistics. (See Where to Send Transcripts/Diplomas)
可是申请季还没毕业哪有diploma，这个明确写在application process里面的。。应该怎么解决呀？

没毕业提交在读证明，像我已经毕业在读硕士，就提交本科的毕业证学位证、及研究生阶段的在读证明。