Markdown cells are invalid when opening jupyter

Create a notebook Create some code cells Run them Convert to markdown Open in jupyter.

You’ll get something like so:

 ERROR | Notebook JSON is invalid: Additional properties are not allowed ('execution_count', 'outputs' were unexpected)

Failed validating 'additionalProperties' in markdown_cell:

On instance['cells'][2]:
{'cell_type': 'markdown',
 'execution_count': 1,
 'metadata': {},
 'outputs': ['...1 outputs...'],
 'source': '\\begin{equation*}\n'
           '\\mathbf{V}_1 \\times \\mathbf{V}_2 = \\begin{vmat...'}

[edgarrc]

I don’t know if it is the same issue but when I try to convert a notebook (jupyter nbconvert --to script … ) that was edited using VS Code and clicked on Clear All Ouput I receive the error:

ERROR | Notebook JSON is invalid: ‘execution_count’ is a required property

I have to run all cells before converting so this attribute placed on all cells.

Maybe this count should be set to zero instead if we clear output.

[IanMatthewHuff]

Validated both of the markdown scenarios listed here.