Cannot remove entry from grade reference

[killakalle]

I've cleared the fields Your grade and Your stars.

but the grade references table still shows an empty line with my name.

Route: https://www.thecrag.com/es/escalar/spain/valencia/route/1428276348

PS:

I don't think anybody's personal grade opinion should be listed here. That's what we have ascent comments and fields for.

Sometimes guidebooks from different authors or different times have a different grade for the same route. That could be valuable information to display (often people just change grades without giving any reason). But I don't see how this can be added as an information, can it?