1👍
I suspect the problem is due to the tenant_id model field you declared in your
ApplicationSetting model. Internally, the package you are using appears to use tenant_id as a reference to the field name of the tenant-related foreign key.
Since you declared tenant_id as a nullable field, the original tenant_id='organization_id' no longer exists. When you initialize your ApplicationSetting, the TenantManager looks for a field named None and tries to find it’s related name (via the attname property), hence the error.
To fix this, remove the tenant_id field.
After, you will probably get different exception, because your ApplicationSetting model doesn’t contain a field named organization. To fix this, you will need to rename your org field:
organization = models.ForeignKey(Organization,on_delete=models.CASCADE)'
Alternatively, you can change the tenant_id to org_id instead.
Disclaimer: I’m not at all familiar with the package you are using.