Older versions of Yapped used boolean values. But with the change to the Paramdex, all of those boolean fields have become integer fields, with 0 being false and 1 being true. So older CSV files will contain invalid strings such as True or False, throwing that error.

If you want to fix it, the easiest way would be to open the CSV file in a text editor and use Find and Replace to replace "True" with "1" and "False" with "0".

Thank you very much for your reply. Could you also help me with a similar error for values of "-1"? This too did not occur in the previous versions. I apologise for the pestering.

Hello, is there a way to skip these messages ? i would really appreciate it

I encountered a similar error when importing an old CSV into DSMapStudio. In my case, the solution was to replace all the ';' signs with ',' and delete the 'Row' in the first line that contains the 'Row ID,Row Name,.....' and in some cases, add 'reserve' to that line.
To find out the differences, I simply exported the standard data to a CSV file and compared it with the old CSV. In the web text comparison service.
Excuse my English, I use a translator ;)

@ErsteNacht Dude I had the same issue, but the Data and the field, have the same information, the same format... -1
Cara eu tive o mesmo problema, mas o dado que acusa o erro exatamente no mesmo campo, é o mesmíssimo dado com o mesmo formato ou seja, -1. Nem sei mais o que fazer... modifiquei e organizei os dados do CSV para que ficassem iguais ao original e resolvi o primeiro problema mas agora to nesse. Yapped Bear diz que o campo é invalido mas eu pego o arquivo original importado por ele, e é a mesma coisa... tentei importar utilizando um programa de planilhas importei somente os dados novos baseados no CSV do mod, foi sucesso mas dá a mesma mensagem depois quando tento importar para o mod do game usando o yapped.
Sad....