why I recieved this error?

[NSH531]

Traceback (most recent call last):
File "files.py", line 25, in
mydata = MyData(query=query,filename=a,lineNum=ln,lineText=part).save()
File "C:\Users\User\AppData\Local\Programs\Python\Python38\lib\site-packages\o
rm.py", line 158, in save
return self.class.manager(type_check=type_check).save(self)
File "C:\Users\User\AppData\Local\Programs\Python\Python38\lib\site-packages\o
rm.py", line 172, in manager
return Manager(db if db else cls.db, cls, type_check)
File "C:\Users\User\AppData\Local\Programs\Python\Python38\lib\site-packages\o
rm.py", line 83, in init
self.db.executescript(render_create_table_stmt(self.model))
File "C:\Users\User\AppData\Local\Programs\Python\Python38\lib\site-packages\o
rm.py", line 35, in render_create_table_stmt
column_definitions = ', '.join(render_column_definitions(model))
File "C:\Users\User\AppData\Local\Programs\Python\Python38\lib\site-packages\o
rm.py", line 29, in render_column_definitions
return ['%s %s' % (k, DATA_TYPES[v]) for k, v in attrs(model).items()]
File "C:\Users\User\AppData\Local\Programs\Python\Python38\lib\site-packages\o
rm.py", line 29, in
return ['%s %s' % (k, DATA_TYPES[v]) for k, v in attrs(model).items()]
KeyError: <orm.Database object at 0x0000000002542C40>

[Vanane]

Hi,
Just in case anyone has this problem ever again : table names much match the name of the model classes, and it is case-sensitive.