Unable to update composer.lock - silverstripe-4

Question

It shows error
Problem 1
The requested package silverstripe/cms (locked at 3.3.4, required as 4.3.*) is satisfiable by silverstripe/cms[3.3.4] but these conflict with your requirements or minimum-stability.
Problem 2
The requested package silverstripe/framework (locked at 3.3.4, required as 4.3.*) is satisfiable by silverstripe/framework[3.3.4] but
these conflict with your requirements or minimum-stability.
Problem 3
The requested package silverstripe/reports (locked at 3.3.4, required as 4.3.*) is satisfiable by silverstripe/reports[3.3.4] but
these conflict with your requirements or minimum-stability.
Problem 4
The requested package silverstripe/siteconfig (locked at 3.3.4, required as 4.3.*) is satisfiable by silverstripe/siteconfig[3.3.4]
but these conflict with your requirements or minimum-stability.
Problem 5
Conclusion: don't install silverstripe/framework 4.3.0
Conclusion: don't install silverstripe/framework 4.3.0-rc1
Conclusion: don't install symfony/yaml v3.4.21
Installation request for silverstripe/framework 4.3.* -> satisfiable by silverstripe/framework[4.3.0, 4.3.0-rc1, 4.3.x-dev].
Conclusion: don't install symfony/yaml v2.8.14
here is my composer.json
{
"license": "proprietary",
"name": "silverstripe/installer",
"description": "The SilverStripe Framework Installer",
"require": {
"php": ">=5.3.3",
"silverstripe/cms": "4.3.*",
"silverstripe/framework": "4.3.*",
"silverstripe/reports": "4.3.*",
"silverstripe/siteconfig": "4.3.*",
"silverstripe-themes/simple": "3.1.*"
},
"require-dev": {
"phpunit/PHPUnit": "~3.7#stable"
},
"extra": {
"branch-alias": {
"3.x-dev": "3.3.x-dev"
}
},
"config": {
"process-timeout": 600
},
"minimum-stability": "dev",
"prefer-stable": true
}
and here is my composer.lock
{
"_readme": [
"This file locks the dependencies of your project to a known state",
"Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
"This file is #generated automatically"
],
"content-hash": "ec3b880695b4cb0f347890bbac55f200",
"packages": [
{
"name": "composer/installers",
"version": "v1.2.0",
"source": {
"type": "git",
"url": "https://github.com/composer/installers.git",
"reference": "d78064c68299743e0161004f2de3a0204e33b804"
},
"dist": {
"type": "zip",
"url": "https://api.github.com/repos/composer/installers/zipball/d78064c68299743e0161004f2de3a0204e33b804",
"reference": "d78064c68299743e0161004f2de3a0204e33b804",
"shasum": ""
},
"require": {
"composer-plugin-api": "^1.0"
},
"replace": {
"roundcube/plugin-installer": "*",
"shama/baton": "*"
},
"require-dev": {
"composer/composer": "1.0.*#dev",
"phpunit/phpunit": "4.1.*"
},
"type": "composer-plugin",
"extra": {
"class": "Composer\\Installers\\Plugin",
"branch-alias": {
"dev-master": "1.0-dev"
}
},
"autoload": {
"psr-4": {
"Composer\\Installers\\": "src/Composer/Installers"
}
},
"notification-url": "https://packagist.org/downloads/",
"license": [
"MIT"
],
"authors": [
{
"name": "Kyle Robinson Young",
"email": "kyle#dontkry.com",
"homepage": "https://github.com/shama"
}
],
"description": "A multi-framework Composer library installer",
"homepage": "https://composer.github.io/installers/",
"keywords": [
"Craft",
"Dolibarr",
"Hurad",
"ImageCMS",
"MODX Evo",
"Mautic",
"OXID",
"Plentymarkets",
"RadPHP",
"SMF",
"Thelia",
"WolfCMS",
"agl",
"aimeos",
"annotatecms",
"attogram",
"bitrix",
"cakephp",
"chef",
"cockpit",
"codeigniter",
"concrete5",
"croogo",
"dokuwiki",
"drupal",
"elgg",
"expressionengine",
"fuelphp",
"grav",
"installer",
"joomla",
"kohana",
"laravel",
"lithium",
"magento",
"mako",
"mediawiki",
"modulework",
"moodle",
"phpbb",
"piwik",
"ppi",
"puppet",
"reindex",
"roundcube",
"shopware",
"silverstripe",
"symfony",
"typo3",
"wordpress",
"yawik",
"zend",
"zikula"
],
"time": "2016-08-13T20:53:52+00:00"
},
{
"name": "silverstripe-themes/simple",
"version": "3.1.0",
"source": {
"type": "git",
"url": "https://github.com/silverstripe-themes/silverstripe-simple.git",
"reference": "3cf638c170e649b6b122504c8f62d6d8946b853c"
},
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"shasum": ""
},
"require": {
"composer/installers": "*",
"silverstripe/framework": ">=3.0"
},
"type": "silverstripe-theme",
"notification-url": "https://packagist.org/downloads/",
"license": [
"BSD-3-Clause"
],
"authors": [
{
"name": "Sara Tušar (Innovaif)",
"homepage": "http://www.saratusar.com"
}
],
"description": "The SilverStripe simple theme (default SilverStripe 3 theme)",
"keywords": [
"silverstripe",
"theme"
],
"time": "2015-04-09T03:18:37+00:00"
},
{
"name": "silverstripe/cms",
"version": "3.3.4",
"source": {
"type": "git",
"url": "https://github.com/silverstripe/silverstripe-cms.git",
"reference": "f66e154a02e903d9f794cf693dec78eae2209951"
},
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},
"type": "silverstripe-module",
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]
},
"notification-url": "https://packagist.org/downloads/",
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],
"authors": [
{
"name": "SilverStripe",
"homepage": "http://silverstripe.com"
},
{
"name": "The SilverStripe Community",
"homepage": "http://silverstripe.org"
}
],
"description": "The SilverStripe Content Management System",
"homepage": "http://silverstripe.org",
"keywords": [
"cms",
"silverstripe"
],
"time": "2016-11-21T12:37:05+00:00"
},
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]
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"authors": [
{
"name": "SilverStripe",
"homepage": "http://silverstripe.com"
},
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"description": "The SilverStripe framework",
"homepage": "http://silverstripe.org",
"keywords": [
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"time": "2016-11-22T13:12:14+00:00"
},
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"authors": [
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"name": "SilverStripe",
"homepage": "http://silverstripe.com"
},
{
"name": "The SilverStripe Community",
"homepage": "http://silverstripe.org"
}
],
"description": "Reports module for SilverStripe CMS",
"homepage": "http://silverstripe.org",
"keywords": [
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],
"time": "2016-11-15T12:08:05+00:00"
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"email": "will#fullscreen.io"
}
],
"description": "Site wide settings administration.",
"keywords": [
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],
"time": "2016-11-21T12:37:07+00:00"
}
],
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"autoload": {
"psr-4": {
"Symfony\\Component\\Yaml\\": ""
},
"exclude-from-classmap": [
"/Tests/"
]
},
"notification-url": "https://packagist.org/downloads/",
"license": [
"MIT"
],
"authors": [
{
"name": "Fabien Potencier",
"email": "fabien#symfony.com"
},
{
"name": "Symfony Community",
"homepage": "https://symfony.com/contributors"
}
],
"description": "Symfony Yaml Component",
"homepage": "https://symfony.com",
"time": "2016-11-14T16:15:57+00:00"
}
],
"aliases": [],
"minimum-stability": "dev",
"stability-flags": {
"phpunit/phpunit": 0
},
"prefer-stable": true,
"prefer-lowest": false,
"platform": {
"php": ">=5.3.3"
},
"platform-dev": []
}

Answer 1

There are different ways to update the composer.lock only. Here is how I used to update composer.lock files without updating any code.
$ cd /path/to/your/project/
$ composer update nothing
You supposed to see output like below.
Loading composer repositories with package information
Updating dependencies (including require-dev)
Nothing to install or update
Writing lock file
Generating autoload files
Hope it works for you.