The protocol error while running the build the build_lmdb_dataset.py

[darkprices]

I create a custom dataset which contains about 1 million images and their cooresponding text title, when I translate them to the version of lmdb, the error is as below:

Traceback (most recent call last):
File "/code/hexufeng01/Chinese-CLIP/cn_clip/preprocess/build_lmdb_dataset.py", line 50, in
env_img = lmdb.open(lmdb_img,map_size=1024**4)
lmdb.Error: /code/hexufeng01/Chinese-CLIP/datasets/singleZF/lmdb/test/imgs: Protocol error.

NAME="Ubuntu"
VERSION="20.04.5 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.5 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal

Python version:3.9.7
lmbd version:1.4.1