Consider deprecating old store 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 API and reading its current error-handling paths. Clarify whether the intended outcome is descriptive errors, deprecation of the old API, or both; done should include an agreed scope and corresponding validation for the changed behavior.

Written by the indexing model from the issue text.