What is the difference between the Merchant PIN and the Admin PIN?

The Admin PIN allows you to access the settings menu while the Merchant PIN is required when performing a cancellation or refund operation. See https://payxpert-docs.atlassian.net/wiki/spaces/docs/pages/1181319178 and https://payxpert-docs.atlassian.net/wiki/spaces/docs/pages/1181581322 to read more.