Name collision (XmippProtFitEllipsoid) detected while discovering xmipptomo.protocols

The following error shows up after launching any scipion project:
```
Scipion v3.0.12 - Eugenius
ERROR: Name collision (XmippProtFitEllipsoid) detected while discovering xmipptomo.protocols.
 It conflicts with tomo
```
I couldn't find any collisions myself, I only found one protocol with that class name, but there must be some collision with the classname or the label somewhere.