error when run MarkdownField()

Error during template rendering
In template C:\Users\Admin\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\contrib\admin\templates\admin\includes\fieldset.html, error at line 19

context must be a dict rather than Context.
line 19 **{{ field.field }}**

My command in models.py

body = MarkdownField()

Please help me solve this error. I tried but I don't understand how has this error.

Start with models.py and the Django admin template admin/includes/fieldset.html at line 19, then reproduce the MarkdownField() error during template rendering. Determine why the field reaches the template with an incompatible context and verify that the admin renders the field without the reported context error.

Written by the indexing model from the issue text.