Consider deprecating old api API

**Problem**
When working with store, the error messages could be more descriptive.

**Suggestion**
Improve error handling and add detailed error messages.

**Context**
This would help with debugging and maintenance.

Start by locating the store implementation and the old API entry point, then review how current errors are produced and consumed. Define the deprecation scope and document the expected detailed error messages before making changes; done means the API decision and error-handling behavior are clear and covered by relevant checks.

Written by the indexing model from the issue text.