The reason why the document was rewritten is not clarified

I don't understand the reason why the document was rewritten. So. think about the possibility is very important. One of reasons is corruption related to donation. However, it is difficult to apply it, It is because the total money moved is less than 1 billion yen. Even though the reduced money becomes a bribe to politicians, the merit is too small for them. And the the founder of elementary school is struggling with money and can not make a bribe. Meanwhile, some politicians belong too Japan Conference. And he was also belong to it. It suggests that he was forced to donate