To remove non-existing coin. 1 Santeem EE1969-1997

The article
https://en.numista.com/catalogue/pieces2997.html

in mintage section describes
1969 (1977) FM 6% ፲፱፻፷፱ KM#43.3 (Large lion head right)
1969 (1977) FM 12,000 4% ፲፱፻፷፱ KM#43.3 (Large lion head right) Proof

Note. Obviously the percentage is from wrongly described occurrence of lines and has nothing to do with frequency as it expected to be. This is not the case of this topic.

Due to note in follows the percentage is omitted in description, though it it present in the article.

Instead of
1969 (1977) FM ፲፱፻፷፱ KM#43.3 (Large lion head right)
1969 (1977) FM 12,000 ፲፱፻፷፱ KM#43.3 (Large lion head right) Proof

there should be
1969 (1977) FM 12,000 ፲፱፻፷፱ KM#43.3 (Large lion head right) Proof

with adding coins of collectors from the removing line to the line
1969 (1977) FM 12,000 ፲፱፻፷፱ KM#43.3 (Large lion head right) Proof

One is Proof other is not. Where is the problem?