MERGE strategy fails with CrateDB: `AssertionError: assert 'v2' == 'v1'`

## Problem
When attempting to unlock CrateDB per https://github.com/MacHu-GWU/sqlalchemy_upsert_kit-project/pull/1, this software test still fails. We did not investigate closer about the root cause yet.
```
FAILED tests/sqlite/test_sqlite_insert_or_merge.py::test_success - AssertionError: assert 'v2' == 'v1'
```
