manage.py makemigrations works but manage.py migrate did not

Question

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how to solve the error.I first created the model with only one class and the makemigrations and migrate work perfect. but now i add another class in model but now migrate did not work the output is in pic. django version is 1.11 and i also register it in admin.py

Answer 1

python manage.py makemigrations ----> for all app

python manage.py makemigrations app_name ----> for a specific app

python manage.py migrate ----> for all the apps,

N.B. = migrate doesnt take any app name , you need to run only python manage.py migrate