I have many misunderstandings about Lucidspark space management.

At first, we had a collaborative project, and I created the document in Lucidspark with my personal account gracetrishhome@gmail.com; I upgraded it to the individual plan, and in the process of working, we had a problem with space.

After a significant amount of trying to understand how to clean a space, I realised this was impossible.

Question: How can I clean the space? Any attempts to delete an image on the board do not have any effect.

I found the topic in your comunity borad Troubleshooting: Storage – Lucid but there is nothing to help me.

Also I found this topic Storage options for account with a lot of image-heavy documents | Community - it's the same problem.

I also tried to transfer ownership of documents to another account (corporate), and now I can work with documents with another account. But my personal account still has 0 of 1 GB of space left.
There are also no documents with pictures in the list of documents at all, but the amount of space has not changed.