Hi there!
To get rid of this message, be sure that your session is closed at
first.
Right-click on the Logic session file (ending with .logic) and choose
“Show Package Contents” in the contextual menu.
Once inside the bundle, you will
see a file named “documentData_lowmem”.
Simply delete it, then close the Finder
window.
Open your session once again, and that annoying message will be gone