# Challenges Integrating two systems in a two-way fashion has a lot of nuanced challenges. You have to consider the data structures of both systems, where the trigger points in each system reside, the state machines of the data structures in both systems, and how these state machines operate with one another and which system is the source of truth for data. But the main challenges lie within the security and data integrity between the two systems. Next we'll explore why this is so important. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.thallo.io/registry-integration/challenges.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.