Grey photos appears in lightroom, bug

[jarmenighet]

In my Lightroom library deleted photos doesn't disappear. They're kept in Lightroom with only a grey rectangeled symbol. See photo. How can I clean up my Lightroom library?

[jarmenighet]

There is no info in Develop-mode and I've tried the colour profile-solution.

These grey areas is buged windows.

[dj_paige]

Please provide the following basic information:

[jarmenighet]

Adobe Lightromm Classic CC (10.1.1 Release, Camera RAW 13.1)

Macbook Pro, Big Sur 11.2, 16GB RAM, 2,5 GHz, AMD Radeon R9 M370X 2 GB

Zero error messages.

Found the problem while building smart previews. 

[dj_paige]

I have two suggestions:

1. Reset the preference file
2. Select these photos and then delete the Smart Previews and regular Previews for them (Library->Previews->Discard Smart previews and Library->Previews->Discard 1:1 Previews)

[JohanElzenga]

Do you make regular catalog backups? This looks like catalog corruption. I have seen reports like these before. BTW, the selected image in your screenshot does not have a smart preview.