How to remove only some reference from glyphs automatically?

[KamilLanda]

Tested font: Untitled1.zip

I have some reference in glyphs, it is hyphen in B and C in the example.

I want to remove this reference from B and C. How to do it if I don't want to traverse the glyphs one-by-one and delete the reference manually?

I tried select the hyphen and Edit > Clear -> Yes to All.

Optically it seems the reference is deleted, but if I open the glyph B, there is still the link from reference.

If I select the glyph "B" and Edit > Unlink Referece,

then it removes the reference hyphen, but also unlinks the next reference plus

If I use Edit > Unlink Reference in glyph's detail, it seems OK. But only in this simple example, in more complicated font it unlinks all references.

But I cannot remove the references manually, there are the thousands of references in the font I make.

I also tried to remove the lines Refer: XXXX ... from SFD file, but then some bugs occured.