diff --git a/packages/docusaurus-plugin-content-docs/src/__tests__/docFrontMatter.test.ts b/packages/docusaurus-plugin-content-docs/src/__tests__/docFrontMatter.test.ts
index f8f1b067a9..f3997d6fcb 100644
--- a/packages/docusaurus-plugin-content-docs/src/__tests__/docFrontMatter.test.ts
+++ b/packages/docusaurus-plugin-content-docs/src/__tests__/docFrontMatter.test.ts
@@ -196,17 +196,17 @@ describe('validateDocFrontMatter sidebar_position', () => {
   testField({
     fieldName: 'sidebar_position',
     validFrontMatters: [
+      {sidebar_position: -5},
+      {sidebar_position: -3.5},
       {sidebar_position: 0},
       {sidebar_position: 5},
       {sidebar_position: 3.5},
     ],
     convertibleFrontMatter: [
+      [{sidebar_position: '-1.5'}, {sidebar_position: -1.5}],
       [{sidebar_position: '1'}, {sidebar_position: 1}],
       [{sidebar_position: '1.5'}, {sidebar_position: 1.5}],
     ],
-    invalidFrontMatters: [
-      [{sidebar_position: -1}, 'must be greater than or equal to 0'],
-    ],
   });
 });
 
diff --git a/packages/docusaurus-plugin-content-docs/src/docFrontMatter.ts b/packages/docusaurus-plugin-content-docs/src/docFrontMatter.ts
index 2def606120..70e1d8ac33 100644
--- a/packages/docusaurus-plugin-content-docs/src/docFrontMatter.ts
+++ b/packages/docusaurus-plugin-content-docs/src/docFrontMatter.ts
@@ -28,7 +28,7 @@ const DocFrontMatterSchema = Joi.object<DocFrontMatter>({
   description: Joi.string().allow(''), // see  https://github.com/facebook/docusaurus/issues/4591#issuecomment-822372398
   slug: Joi.string(),
   sidebar_label: Joi.string(),
-  sidebar_position: Joi.number().min(0),
+  sidebar_position: Joi.number(),
   pagination_label: Joi.string(),
   custom_edit_url: URISchema.allow('', null),
   parse_number_prefixes: Joi.boolean(),