diff --git a/src/exports.ts b/src/exports.ts
index c40849d9..c4239c1d 100644
--- a/src/exports.ts
+++ b/src/exports.ts
@@ -171,8 +171,10 @@ function parseExport(
 export function getExportPaths(pkg: PackageMetadata) {
   const pathsMap: Record<string, FullExportCondition> = {}
   const packageType = getPackageType(pkg)
-
+  const isCjsPackage = packageType === 'commonjs'
+  
   const { exports: exportsConditions } = pkg
+  
   if (exportsConditions) {
     const paths = parseExport(exportsConditions, packageType)
     Object.assign(pathsMap, paths)
@@ -181,12 +183,21 @@ export function getExportPaths(pkg: PackageMetadata) {
   // main export '.' from main/module/typings
   const defaultMainExport = constructFullExportCondition(
     {
-      [packageType === 'commonjs' ? 'require' : 'import']: pkg.main,
+      [isCjsPackage ? 'require' : 'import']: pkg.main,
       module: pkg.module,
       types: getTypings(pkg),
     },
     packageType,
   )
+  
+  if (isCjsPackage && pathsMap['.']?.['require']) {
+    // pathsMap's exports.require are prioritized.
+    defaultMainExport['require'] = pathsMap['.']['require']
+
+    console.warn(
+      `(warning) "exports.require" has overwritten "main" since they are duplicated.`,
+    )
+  }
 
   // Merge the main export into '.' paths
   const mainExport = Object.assign({}, pathsMap['.'], defaultMainExport)
diff --git a/test/lib-unit/exports.test.ts b/test/lib-unit/exports.test.ts
index e3342c93..55759278 100644
--- a/test/lib-unit/exports.test.ts
+++ b/test/lib-unit/exports.test.ts
@@ -151,6 +151,29 @@ describe('lib exports', () => {
         },
       })
     })
+
+    it('should warn the duplicated export conditions', () => {
+      const logSpy = jest.spyOn(console, 'warn')
+
+      expect(
+        getExportPaths({
+          main: './dist/index.js',
+          exports: {
+            import: './dist/index.mjs',
+            require: './dist/index.cjs',
+          },
+        }),
+      ).toEqual({
+        '.': {
+          import: './dist/index.mjs',
+          require: './dist/index.cjs',
+        },
+      })
+
+      expect(logSpy).toHaveBeenCalledWith(
+        '(warning) "exports.require" has overwritten "main" since they are duplicated.',
+      )
+    })
   })
 
   describe('getExportConditionDist', () => {