Consider deprecating old data 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 data API entry points mentioned in the issue. Review how current errors are produced and determine the scope of the deprecation; done means the intended API status and more descriptive error behavior are clearly defined and covered by appropriate checks.

Written by the indexing model from the issue text.