I have faced these issue when trying to upgrade Laravel 8 to 10

Problem 1 - illuminate/database[v7.0.0, ..., v7.28.4] require php ^7.2.5 -> your php version (8.1.6) does not satisfy that requirement. - symfony/console[v5.0.0, ..., v5.0.8] require php ^7.2.5 -> your php version (8.1.6) does not satisfy that requirement. - spatie/laravel-sluggable 2.6.1 requires phpunit/phpunit ^9.5 -> found phpunit/phpunit[9.5.0, ..., 9.6.4] but it conflicts with your root composer.json require (^10.0). - illuminate/database[v8.0.0, ..., v8.11.2] require php ^7.3 -> your php version (8.1.6) does not satisfy that requirement. - spatie/laravel-sluggable 2.6.2 requires illuminate/database ^7.30|^8.0 -> satisfiable by illuminate/database[v7.30.0, ..., v7.30.6, v8.0.0, ..., v8.83.27]. - spatie/laravel-sluggable 2.6.0 requires illuminate/database ^7.0|^8.0 -> satisfiable by illuminate/database[v7.0.0, ..., v7.30.6, v8.0.0, ..., v8.83.27]. - illuminate/database[v8.74.0, ..., v8.83.27] require symfony/console ^5.4 -> satisfiable by symfony/console[v5.4.0, ..., v5.4.21]. - illuminate/database[v8.18.1, ..., v8.73.2] require symfony/console ^5.1.4 -> satisfiable by symfony/console[v5.1.4, ..., v5.4.21]. - illuminate/database[v8.12.0, ..., v8.18.0] require symfony/console ^5.1 -> satisfiable by symfony/console[v5.1.0, ..., v5.4.21]. - illuminate/database[v7.29.0, ..., v7.30.6] require symfony/console ^5.0 -> satisfiable by symfony/console[v5.0.0, ..., v5.4.21]. - You can only install one version of a package, so only one of these can be installed: symfony/console[v2.3.10, ..., v2.8.52, v3.0.0, ..., v3.4.47, v4.0.0, ..., v4.4.49, v5.0.0, . .., v5.4.21, v6.0.0, ..., v6.2.7]. - symfony/var-dumper[v6.1.0, ..., v6.2.7] conflict with symfony/console v5.3.16. - symfony/var-dumper[v6.1.0, ..., v6.2.7] conflict with symfony/console v5.3.14. - symfony/var-dumper[v6.1.0, ..., v6.2.7] conflict with symfony/console v5.3.10. - symfony/var-dumper[v6.1.0, ..., v6.2.7] conflict with symfony/console v5.3.2. - symfony/var-dumper[v6.1.0, ..., v6.2.7] conflict with symfony/console v5.2.14. - symfony/var-dumper[v6.1.0, ..., v6.2.7] conflict with symfony/console v5.2.11. - symfony/var-dumper[v6.1.0, ..., v6.2.7] conflict with symfony/console v5.0.11. - spatie/laravel-ignition 2.0.0 requires symfony/console ^6.2.3 -> satisfiable by symfony/console[v6.2.3, v6.2.5, v6.2.7]. - spatie/laravel-ignition 2.0.0 requires symfony/var-dumper ^6.2.3 -> satisfiable by symfony/var-dumper[v6.2.3, v6.2.5, v6.2.7]. - Root composer.json requires spatie/laravel-ignition ^2.0 -> satisfiable by spatie/laravel-ignition[2.0.0]. - Root composer.json requires spatie/laravel-sluggable ^2.6 -> satisfiable by spatie/laravel-sluggable[2.6.0, 2.6.1, 2.6.2].