## Description 

per Xun's report 

https://linear.app/mysten-labs/issue/DP-43/bug-epochendindexingobjectstore-might-contain-multiple-versions-of

## Test plan 

CI
ideally in the long run we want to have an embedded DB and test it on CI
with a test, but we lack that today.

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## Release notes

Check each box that your changes affect. If none of the boxes relate to
your changes, release notes aren't required.

For each box you select, include information after the relevant heading
that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] Indexer: 
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:
- [ ] REST API: