Error message on the page having JL Cotnent Fileds Filter

Hi,

As you might know, I write a lot and share a lot about Custom Fields (in the Joomla Community Magazine, at JoomlaDays etc).

Many times I have referred to your extension when people were looking for a filter solution.
And I was happy to try it today for the first time

But when using it, I get the following error message :
Fatal error: Cannot declare class ContentModelCategory, because the name is already in use in /home/projpmmc/public_html/components/com_content/models/category.php on line 0

My template is Astroid by JoomDev.

Then when I tried with Protostar I would not get that error.
How can I solve this error issue ?

Txs a lot and congratulations

Marc

Txs very much for the clarification.

I hope some workaround will come for this
If you need a tester, I am ready to help !

I really appreciate your contribution with this useful (and free) extension...