After creating a new version 4.1 Adonis project migrations do not work

[simonjcarr]

I tried out Adonis 5 last week. I installed it using npm i -g @adonisjs/cli@next
I now need to create an Adonis v4.1 project. I uninstalled version 5 with npm uninstall -g @adonisjs/cli@next and for good measure, I also ran npm uninstall -g @adonisjs/cli
I reinstalled Adonis version 4 with npm i @adonisjs/cli
I created a new project using adonis new adonis_api --api-only
The first problem I noticed was that migrations were not working. After running adonis migration:run I got the following error

adonis migration:run
TypeError: schemas[schema] is not a constructor
    at Migration._execute (/Users/simon/development/adonis/adonis_api_tutorial/node_modules/@adonisjs/lucid/src/Migration/index.js:271:33)
    at Migration.up (/Users/simon/development/adonis/adonis_api_tutorial/node_modules/@adonisjs/lucid/src/Migration/index.js:379:18)
    at async MigrationRun.handle (/Users/simon/development/adonis/adonis_api_tutorial/node_modules/@adonisjs/lucid/commands/MigrationRun.js:72:45)
    at async /Users/simon/development/adonis/adonis_api_tutorial/node_modules/@adonisjs/ace/src/Command/index.js:565:26

When I looked in package.json I noticed a mixture of Version 4 and version 5 dependencies

{
  "name": "adonis-api-app",
  "version": "4.1.0",
  "adonis-version": "4.1.0",
  "description": "Adonisjs boilerplate for API server with pre-configured JWT",
  "main": "index.js",
  "scripts": {
    "start": "node server.js",
    "test": "node ace test"
  },
  "keywords": [
    "adonisjs",
    "adonis-app"
  ],
  "author": "",
  "license": "UNLICENSED",
  "private": true,
  "dependencies": {
    "@adonisjs/ace": "^5.0.8",
    "@adonisjs/auth": "^3.0.7",
    "@adonisjs/bodyparser": "^2.0.5",
    "@adonisjs/cors": "^1.0.7",
    "@adonisjs/fold": "^4.0.9",
    "@adonisjs/framework": "^5.0.9",
    "@adonisjs/ignitor": "^2.0.8",
    "@adonisjs/lucid": "^6.1.3",
    "mysql": "^2.18.1"
  },
  "devDependencies": {},
  "autoload": {
    "App": "./app"
  }
}

What should I do, to fully remove version 5?