requested database does not belong to the calling thread

The error message "requested database does not belong to the calling thread" typically occurs when multiple threads are attempting to access or modify a database concurrently, but the database connection is not properly managed or shared between the threads.

To resolve this issue, you should ensure that each thread has its own dedicated database connection or connection pool. Each thread should obtain its own database connection from the pool and release it when finished. This ensures that the database connection is not shared among multiple threads.

If you are using a specific database library or framework, consult its documentation for proper multi-threading guidelines and best practices. Additionally, make sure you are correctly managing the lifecycle of the database connections and ensuring that they are properly closed or released when no longer needed.

By properly managing the database connections and ensuring that each thread has its own connection, you should be able to avoid the "requested database does not belong to the calling thread" error