MakeMigration after field modified

Hi, I changed for model, html, view and other files the name collaborators to instructors.
I launched makemigration and migration and everything went well.
I added fields to the instructors model and launching aikemigration returns this error:

 File "C:\ProjectsPython\PalestraGes\venv\Lib\site-packages\django\db\migrations\operations\", line 93, in state_forwards
  File "C:\ProjectsPython\PalestraGes\venv\Lib\site-packages\django\db\migrations\", line 248, in add_field
    self.models[model_key].fields[name] = field
KeyError: ('Site', 'contributors')

How do I solve it ?
Doing a search I noticed that the name 'collaborators is only present in the migration files