TL;DR: your pandarallel is too old for your pyarrow. pyarrow removed its Plasma store, so upgrade pandarallel to a release that no longer uses it, or pin an older pyarrow.

## The error
```text
ImportError: cannot import name 'PlasmaStoreFull' from 'pyarrow.lib'
```

## Fix it
1. Upgrade pandarallel:
   ```
   pip install -U pandarallel
   ```
   Expected: installs a release fixed for modern pyarrow.
2. Verify:
   ```
   python -c "import pandarallel; print('ok')"
   ```
   Expected: imports cleanly.
3. Workaround if you cannot upgrade pandarallel: pin pyarrow below the Plasma removal:
   ```
   pip install "pyarrow<12"
   ```
   Expected: the old name exists again.

## When this applies
Use this when `import pandarallel` raises this error with a recent pyarrow.

## When it does not apply
If your own code uses pyarrow.plasma, migrate off Plasma entirely; it is gone for good. If pandarallel is current, reinstall it.

## Compatibility
pandarallel releases before the Plasma fix; pyarrow 12+ where Plasma was removed.

## Root cause
pyarrow deprecated its Plasma in-memory object store and removed it in pyarrow 12. pandarallel imported PlasmaStoreFull from pyarrow.lib, so the removal broke it at import time.

## Edge cases
Pinning old pyarrow conflicts with pandas versions that need new pyarrow; upgrading pandarallel is the durable fix. Plasma is unmaintained upstream, so no future pyarrow will bring it back.