Can't install backpack genreators.Laravel version 7.10 - php

Question

I have a freshly installed Laravel 7.10.* I want to install the Backpack composer require backpack/generators --dev but cannot install the generators. Here is the error.
Your requirements could not be resolved to an installable set of packages.
Problem 1
Installation request for laravel/framework (locked at v7.10.3, required ^7.0) -> satisfiable by laravel/framework[v7.10.3].
Installation request for backpack/generators ^3.0 -> satisfiable by backck/generators[3.0.0, v3.0.1, v3.x-dev].
Can only install one of: backpack/crud[4.1.x-dev, 4.0.61].
Can only install one of: backpack/crud[4.1.x-dev, 4.0.61].
Can only install one of: backpack/crud[4.1.x-dev, 4.0.61].
Conclusion: install backpack/crud 4.1.x-dev
Installation request for backpack/crud (locked at 4.0.61, required as 4.*) -> satisfiable by backpack/crud[4.0.61].`
Installation failed, reverting ./composer.json to its original content.
This is my composer.json
{
"name": "laravel/laravel",
"type": "project",
"description": "The Laravel Framework.",
"keywords": [
"framework",
"laravel"
],
"license": "MIT",
"require": {
"php": "^7.2.5",
"backpack/crud": "4.0.*",
"fideloper/proxy": "^4.2",
"fruitcake/laravel-cors": "^1.0",
"guzzlehttp/guzzle": "^6.3",
"laravel/framework": "^7.0",
"laravel/tinker": "^2.0"
},
"require-dev": {
"facade/ignition": "^2.0",
"fzaninotto/faker": "^1.9.1",
"mockery/mockery": "^1.3.1",
"nunomaduro/collision": "^4.1",
"phpunit/phpunit": "^8.5"
},
"config": {
"optimize-autoloader": true,
"preferred-install": "dist",
"sort-packages": true
},
"extra": {
"laravel": {
"dont-discover": []
}
},
"autoload": {
"psr-4": {
"App\\": "app/"
},
"classmap": [
"database/seeds",
"database/factories"
]
},
"autoload-dev": {
"psr-4": {
"Tests\\": "tests/"
}
},
"minimum-stability": "dev",
"prefer-stable": true,
"scripts": {
"post-autoload-dump": [
"Illuminate\\Foundation\\ComposerScripts::postAutoloadDump",
"#php artisan package:discover --ansi"
],
"post-root-package-install": [
"#php -r \"file_exists('.env') || copy('.env.example', '.env');\""
],
"post-create-project-cmd": [
"#php artisan key:generate --ansi"
]
}
}

Answer 1

The problem is that you locked the backpack/crud version as 4.0.*, but for the backpack/generators the satisfiable versions are these: 4.1.0, 4.1.1, 4.1.x-dev
So you should change this line in your composer.json:
"backpack/crud": "4.0.*",
to this:
"backpack/crud": "4.1.*",
then update the composer packages:
composer update
and finally install the generator package:
composer require backpack/generators --dev