Customize the Pop Up Message 'Invoice date is over one year'

Summary:

Customize the Pop Up Message 'Invoice date is over one year' in message AP_INV_VERY_OLD_INV_DATE

Content (please ensure you mask any confidential information):

Hi,

I have a requirement to customize the pop-up message (warning message) that appears when saving an invoice if the invoice date is over one year. I want to customize this in such a way that if the invoice date is over six months this error message will appear. I have found the message relevant to this task and customized the message body as well. However, I want to know how to change the invoice date validation from past one year to past 06 months.