KeyError: <pk> with duplicated 'name'

[wfehr]

When you add your own "name" on fields and you have 2 fields with the same name, a internal server error (KeyError) occurs.
End of trace:

File "/usr/local/lib/python3.6/site-packages/cms/plugin_rendering.py", line 429, in render_plugin
context = plugin.render(context, instance, placeholder.slot)
File "/usr/local/lib/python3.6/site-packages/aldryn_forms/cms_plugins.py", line 385, in render
field_name = form_plugin.get_form_field_name(field=instance)
File "/usr/local/lib/python3.6/site-packages/aldryn_forms/models.py", line 289, in get_form_field_name
return self._form_field_key_cache[field.pk]

Problem:
in FieldPlugin.get_form_field_name() the function "get_form_fields_by_name()" gets called and returns a ordered dict with "(field.name, field)", where the duplicated fields are getting lost because the previous key-value-pair with the exact same "name" gets overwritten.

That said, is there a possible solution to prevent filling in duplicated "name"s for fields or maybe to just prevent a server error and print out something like "this field has a duplicated name, change it"?

[bartTC]

This happened to us out of the blue with copy/pasting a field into a form, where a field with the same name already existed.

There's no way for an editor to fix this, I had to slice this 'broken' plugin manually out of the db.

[oesah]

Same issue here :( @bartTC How did you delete it manually?