library element create problem

Hi,

I have a problem with library elements.

I created a new element <Omron Varispeed L7> by modifying the Leroy M750 from the QE library and saving it with a new name, maybe I forgot to enter the "element label".
Maybe that's why it imports it into the drawing but doesn't recognize it as a "block"?
Reopening it in "edit element" mode it says "too many elements" (but the original does it too) and all lines, texts...

Is there any possibility recovery to edit the *.elmt file with kate to fix it without redoing all the work?

Thank you.