Delete Uploaded File - Troubleshooting

Hi Bubblers,

I have read several threads regarding how to delete an image from the bubble database and unfortunately, I’m still struggling…

Here are the details:

An in-app plugin generates a QR code and saves it to the bubble database.
Screen Shot 2023-01-27 at 2.33.29 PM

Screen Shot 2023-01-26 at 1.58.13 AM

Here is the uploaded image’s URL:

Because each jar has its own QR code, the workflow needs to delete the specific QR code attached to the jar from the database.

Workflow Step 1:
(I’ve tried several different strings)

Here are my options for step 1:
Screen Shot 2023-01-27 at 1.24.36 PM

Workflow Step 2:
I set QR = [blank]

No matter how I write the workflow, the item remains in my database.

I’ve even tried deleting the exact file’s URL when something is clicked and it still remains in the database:

Screen Shot 2023-01-27 at 1.48.32 PM

Which part am I getting wrong?
Thank you for any assistance provided!