[Task] maximum TYPO3 compatibility v14.1.999 due to change [#108819](https://forge.typo3.org/issues/108819) which provoked an error in the backend despite being 'Feature' only.

Author: DavidBruchmann

composer.json

@@ -29,44 +29,44 @@
 	},
 	"require": {
 		"php": "^8.2",
-		"typo3/cms-backend": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-core": "^13.4 || ^14.0 || dev-main"
+		"typo3/cms-backend": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-core": "^13.4 || ^14.0 < 14.2"
 	},
 	"suggest": {
-		"b13/container": "Extension to use cuszom container elements."
+		"b13/container": "Extension to use custom container elements."
 	},
 	"require-dev": {
 		"ergebnis/composer-normalize": "^2.31",
 		"friendsofphp/php-cs-fixer": "^3.64.0",
 		"phpstan/phpstan": "^1.12.5",
 		"phpstan/phpstan-phpunit": "^1.4.0",
 		"phpunit/phpunit": "^10.5.35",
-		"typo3/cms-adminpanel": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-belog": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-beuser": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-dashboard": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-extbase": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-extensionmanager": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-filelist": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-fluid": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-fluid-styled-content": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-form": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-frontend": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-info": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-install": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-lowlevel": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-opendocs": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-recycler": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-redirects": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-reports": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-rte-ckeditor": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-scheduler": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-seo": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-setup": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-styleguide": "^13.3 || ^14.0 || dev-main",
-		"typo3/cms-tstemplate": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-viewpage": "^13.4 || ^14.0 || dev-main",
-		"typo3/cms-workspaces": "^13.4 || ^14.0 || dev-main",
+		"typo3/cms-adminpanel": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-belog": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-beuser": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-dashboard": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-extbase": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-extensionmanager": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-filelist": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-fluid": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-fluid-styled-content": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-form": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-frontend": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-info": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-install": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-lowlevel": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-opendocs": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-recycler": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-redirects": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-reports": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-rte-ckeditor": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-scheduler": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-seo": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-setup": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-styleguide": "^13.3 || ^14.0 < 14.2",
+		"typo3/cms-tstemplate": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-viewpage": "^13.4 || ^14.0 < 14.2",
+		"typo3/cms-workspaces": "^13.4 || ^14.0 < 14.2",
 		"typo3/testing-framework": "^8.2.2"
 	},
 	"conflict": {