AttributeError: Can only use .str accessor with string values!

Please make sure these conditions are met

• I have checked that this issue has not already been reported.
• I have confirmed this bug exists on the latest version of scanpy.
• (optional) I have confirmed this bug exists on the main branch of scanpy.

What happened?

Dear scanpy teams, research fellows,
I downloaded some scRNA-seq data from https://zenodo.org/records/3357167,
and when I was tring to use anndata.AnnData.concatenate to combine two read count data(I checked their dimensions and the result were Baron_human: [2133,22758] and Segerstolpe: [8569,17500] which means they certainly have different annotated genes), I got below error.

Could u help. many thanks!!

Minimal code sample

all_adata = anndata.AnnData.concatenate(train_adata,test_adata)

Error output

  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python310\lib\site-packages\pandas\core\strings\accessor.py", line 245, in _validate
    raise AttributeError("Can only use .str accessor with string values!")
AttributeError: Can only use .str accessor with string values!

Versions

>>> scanpy.logging.print_versions()
-----
anndata     0.8.0
scanpy      1.9.3
-----
CIForm              NA
PIL                 9.1.0
astunparse          1.6.3
cffi                1.15.1
colorama            0.4.6
cycler              0.10.0
cython_runtime      NA
dateutil            2.8.2
google              NA
h5py                3.11.0
igraph              0.10.4
joblib              1.2.0
kiwisolver          1.4.2
leidenalg           0.9.1
llvmlite            0.39.1
matplotlib          3.5.2
mpl_toolkits        NA
natsort             8.3.1
nt                  NA
numba               0.56.4
numpy               1.23.5
opt_einsum          v3.3.0
packaging           21.3
pandas              2.2.3
plotly              5.13.1
psutil              5.9.4
pyparsing           3.0.9
pytz                2022.1
scipy               1.10.0
session_info        1.0.0
six                 1.16.0
sklearn             1.2.1
texttable           1.6.7
threadpoolctl       3.1.0
torch               1.13.1+cpu
tqdm                4.64.1
typing_extensions   NA
yaml                6.0
zoneinfo            NA
zope                NA
-----
Python 3.10.4 (tags/v3.10.4:9d38120, Mar 23 2022, 23:13:41) [MSC v.1929 64 bit (AMD64)]
Windows-10-10.0.19041-SP0
-----
Session information updated at 2024-09-26 11:05

Start by reproducing the minimal anndata.AnnData.concatenate call with the reported scanpy, anndata, pandas, and Python versions and the linked datasets. Inspect the resulting traceback and the concatenate path to determine whether the failure is caused by the input annotations or dependency compatibility. Done means the cause is confirmed and the issue has a reproducible fix or clear compatibility guidance.