Rectification u/s 154 in case of non resident

Assessee is a non resident. But declared her as a resident in the return and claimed DTAA for foreign income. Later realised that there was no need for such as she is a non resident. Hence it reduces total income.

Now she wants to rectify the return. But the department doesn't allow uploading rectified return on the ground that the rectified return reduces total income.

what is a solution here?