How to fix svn file missing error?

I have a working copy of Experiments, in which I had to add a project called Blue Print.

I did svn add *, later I deleted the Blue Print project folder for some reason. Then I added another project called "MyProj" and used svn add.

Now, when I try to commit, I get a "Blue Print" error message.

I tried svn revert "Blue Print", svn delete "Blue Print"but could not solve the problem. What can I do to fix my working copy and / or repo?