BUG: 'Series' objects are mutable, thus they cannot be hashed
- [x] I have checked that this issue has not already been reported.

- [x] I have confirmed this bug exists on the latest version of pandas.

- [x] (optional) I have confirmed this bug exists on the master branch of pandas.

---

**Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports) detailing how to provide the necessary information for us to reproduce your bug.

#### Code Sample, a copy-pastable example

```python
# Your code here
df = pd.DataFrame({"id":[0, 1, 2], "name":["a", None, None]})
df.query("name.isnull()")

# output:
TypeError: 'Series' objects are mutable, thus they cannot be hashed

```

#### Problem description

i'm so sad about this error, cause i do this 'query' method a lot of times. 
But today, this error happend suddenly, i really don't know what happend with my mac.
i just installed mars library which relative with pandas, and nothing else.
please help me for this problem, so appreciate！！

#### Expected Output
   id  name
1   1  None
2   2  None

#### Output of ``pd.show_versions()``
INSTALLED VERSIONS
------------------
commit           : None
python           : 3.7.6.final.0
python-bits      : 64
OS               : Darwin
OS-release       : 19.4.0
machine          : x86_64
processor        : i386
byteorder        : little
LC_ALL           : None
LANG             : zh_CN.UTF-8
LOCALE           : zh_CN.UTF-8

pandas           : 1.0.3
numpy            : 1.18.1
pytz             : 2019.3
dateutil         : 2.8.1
pip              : 20.1
setuptools       : 46.1.3
Cython           : None
pytest           : 5.0.1
hypothesis       : None
sphinx           : None
blosc            : None
feather          : None
xlsxwriter       : None
lxml.etree       : 4.5.0
html5lib         : None
pymysql          : 0.9.3
psycopg2         : None
jinja2           : 2.10.1
IPython          : 7.13.0
pandas_datareader: None
bs4              : None
bottleneck       : None
fastparquet      : None
gcsfs            : None
lxml.etree       : 4.5.0
matplotlib       : 3.1.2
numexpr          : 2.7.1
odfpy            : None
openpyxl         : 3.0.0
pandas_gbq       : None
pyarrow          : 0.17.0
pytables         : None
pytest           : 5.0.1
pyxlsb           : None
s3fs             : None
scipy            : 1.4.1
sqlalchemy       : 1.3.13
tables           : None
tabulate         : 0.8.7
xarray           : None
xlrd             : 1.2.0
xlwt             : None
xlsxwriter       : None
numba            : 0.48.0


<details>

[TypeError: 'Series' objects are mutable, thus they cannot be hashed]

</details>
