Week 1 Programming Assignment: Convolution Model Application grading error

It looks like you must have duplicated one of the graded cells or something like that. My suggestion would be to get a clean copy of the notebook (See the DLS FAQ Thread for instructions) and then carefully “copy/paste” over your completed work from your current copy to the new clean copy without changing any of the structure of the notebook.

Then submit again and let us know if that helps.

Or if you can figure out which cell is duplicated, try deleting one of the copies.