Shapefile to PostGIS import generates django datetime error - django

Question

Hi I'm trying to populate the PostGIS database of my Django application using a Shapefile. My models.py is the following :
class Flow(models.Model):
# Primary key
flow_id = models.AutoField("ID, flow identifier", primary_key=True)
# Other attributes
stime = models.DateTimeField("Start time")
stime_bc = models.IntegerField("Year of start time before Christ")
stime_unc = models.DateTimeField("Start time uncertainty")
etime = models.DateTimeField("End time")
etime_bc = models.IntegerField("Year of end time before Christ")
etime_unc = models.DateTimeField("End time uncertainty")
final_vers = models.BooleanField("1 if it's the final version, else 0",
default=False)
com = models.CharField("Comments", max_length=255)
loaddate = models.DateTimeField("Load date, the date the data was entered "
"(in UTC)")
pubdate = models.DateTimeField("Publish date, the date the data become "
"public")
cb_ids = models.ManyToManyField(Bibliographic)
# Foreign key(s)
fissure_id = models.ForeignKey(Fissure, null=True,
related_name='flow_fissure_id',
on_delete=models.CASCADE)
cc_load_id = models.ForeignKey(Contact, null=True,
related_name='flow_cc_id_load',
on_delete=models.CASCADE)
cc_pub_id = models.ForeignKey(Contact, null=True,
related_name='flow_cc_id_pub',
on_delete=models.CASCADE)
# Override default table name
class Meta:
db_table = 'flow'
I want to add the features of my coulees.shp Shapefile into my database (more precisely in the flow table). The attribute table looks like this:
Atribute table
To do so I use the Django Layer Mapping:
import os
from django.contrib.gis.utils import LayerMapping
from .models import Flow
mapping = {'stime':'stime', 'stime_bc':'stime_bc', 'stime_unc':'stime_unc', 'etime':'etime', 'etime_bc':'etime_bc', 'etime_unc':'etime_unc', 'com':'com', 'loaddate':'loaddate', 'pubdate':'pubdate', 'geometry':'geometry'}
shp = os.path.abspath(
os.path.join(os.path.dirname(__file__), 'data', '/home/sysop/Coulees/coulees.shp')
)
def run(verbose=True):
lm = LayerMapping(
Flow, shp, mapping,
transform=True
)
lm.save(verbose=True)
But when I try to run this function I get the following error:
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/opt/mapobs/mapobs/app/load.py", line 30, in run
transform=True
File "/opt/mapobs/lib/python3.5/site-packages/django/contrib/gis/utils /layermapping.py", line 106, in __init__
self.check_layer()
File "/opt/mapobs/lib/python3.5/site-packages/django/contrib/gis/utils/layermapping.py", line 256, in check_layer
(ogr_field, ogr_field.__name__, fld_name))
django.contrib.gis.utils.layermapping.LayerMapError: OGR field "<class 'django.contrib.gis.gdal.field.OFTDate'>" (of type OFTDate) cannot be mapped to Django DateTimeField.
Unfortunately, I can't find any useful documentation on the internet.