diff --git a/common/mockData/formatterMockData.ts b/common/mockData/formatterMockData.ts
index bdba25f..9ce275d 100644
--- a/common/mockData/formatterMockData.ts
+++ b/common/mockData/formatterMockData.ts
@@ -252,6 +252,57 @@ export const JSON_SCHEMA_DUPLICATED_CHOICES_SINGLE_SELECT_FAKE_DATA = '{\n' +
   '  }\n' +
   '}';
 
+export const JSON_SCHEMA_DUPLICATED_REQUIRED_PROPERTIES_FAKE_DATA = '{\n' +
+  '    "definition": [\n' +
+  '        "fieldset__title_abnormalities_info",\n' +
+  '        "fieldset__title_general_info",\n' +
+  '        "fieldset__title_markings_info",\n' +
+  '        "fieldset__title_tagging_info"\n' +
+  '    ],\n' +
+  '    "schema": {\n' +
+  '        "icon_id": "reptiles_amphibians_rep",\n' +
+  '        "image_url": "https://mobile-bash.pamdas.org/static/sprite-src/reptiles_amphibians_rep.svg",\n' +
+  '        "properties": {\n' +
+  '            "fieldset__title_abnormalities_info": {\n' +
+  '                "display": "header",\n' +
+  '                "isHidden": false,\n' +
+  '                "readOnly": true,\n' +
+  '                "title": "Abnormalities info",\n' +
+  '                "type": "string"\n' +
+  '            },\n' +
+  '            "fieldset__title_general_info": {\n' +
+  '                "display": "header",\n' +
+  '                "isHidden": false,\n' +
+  '                "readOnly": true,\n' +
+  '                "title": "General info",\n' +
+  '                "type": "string"\n' +
+  '            },\n' +
+  '            "fieldset__title_markings_info": {\n' +
+  '                "display": "header",\n' +
+  '                "isHidden": false,\n' +
+  '                "readOnly": true,\n' +
+  '                "title": "Markings info",\n' +
+  '                "type": "string"\n' +
+  '            },\n' +
+  '            "fieldset__title_tagging_info": {\n' +
+  '                "display": "header",\n' +
+  '                "isHidden": false,\n' +
+  '                "readOnly": true,\n' +
+  '                "title": "Tagging info",\n' +
+  '                "type": "string"\n' +
+  '            }\n' +
+  '        },\n' +
+  '        "required": [\n' +
+  '            "fieldset__title_abnormalities_info",\n' +
+  '            "fieldset__title_general_info",\n' +
+  '            "fieldset__title_markings_info",\n' +
+  '            "fieldset__title_markings_info"\n' +
+  '        ],\n' +
+  '        "title": "Turtle data Report",\n' +
+  '        "type": "object"\n' +
+  '    }\n' +
+  '}';
+
 export const JSON_SCHEMA_DATE_TIME_FIELD_SETS = '{\n' +
   ' "schema": {\n' +
   '  "$schema": "http://json-schema.org/draft-04/schema#",\n' +
diff --git a/src/utils/utils.ts b/src/utils/utils.ts
index 3040d46..2d53716 100644
--- a/src/utils/utils.ts
+++ b/src/utils/utils.ts
@@ -82,4 +82,4 @@ export const isInactiveChoice = (item: any) => item.type === STRING_TYPE
 export const isDisabledChoice = (item: any) => isObject(item) && item.type === CHECKBOXES && item.inactive_titleMap?.length > 0
   && item.titleMap?.length > 0;
 
-export const hasEnumDuplicatedItems = (options: string[]) => (new Set(options).size !== options.length);
+export const hasDuplicatedItems = (items: string[]) => (new Set(items).size !== items.length);
diff --git a/src/validateJsonSchema.ts b/src/validateJsonSchema.ts
index f449002..7b25eef 100644
--- a/src/validateJsonSchema.ts
+++ b/src/validateJsonSchema.ts
@@ -3,7 +3,7 @@ import {
   ElementDisplay,
   getFieldSetTitleKey,
   getSchemaValidations,
-  hasEnumDuplicatedItems,
+  hasDuplicatedItems,
   HELP_VALUE,
   isArrayProperty,
   isCheckbox,
@@ -236,9 +236,9 @@ const validateSchema = (validations: any, schema: any) => {
       // Detect duplicated enum items
       if (
         schema.schema.properties[key].enum?.length > 0
-        && hasEnumDuplicatedItems(schema.schema.properties[key].enum)
+        && hasDuplicatedItems(schema.schema.properties[key].enum)
       ) {
-        throw new Error('Duplicated items');
+        throw new Error('Duplicated enum items');
       }
     }
   }
@@ -270,6 +270,9 @@ export const validateJSONSchema = (stringSchema: string) => {
 
   if (stringSchema.includes(REQUIRED_PROPERTY)) {
     schema.schema = cleanUpRequiredProperty(schema.schema);
+    if (schema.schema.required?.length > 0 && hasDuplicatedItems(schema.schema.required)) {
+      throw new Error('Duplicated required properties');
+    }
   }
   return schema;
 };
diff --git a/test/JsonFormatter.test.tsx b/test/JsonFormatter.test.tsx
index d044937..b515407 100644
--- a/test/JsonFormatter.test.tsx
+++ b/test/JsonFormatter.test.tsx
@@ -6,6 +6,7 @@ import {
   JSON_SCHEMA_DATE_TIME_FIELD_SETS,
   JSON_SCHEMA_DEFAULT_VALUES,
   JSON_SCHEMA_DUPLICATED_CHOICES_SINGLE_SELECT_FAKE_DATA,
+  JSON_SCHEMA_DUPLICATED_REQUIRED_PROPERTIES_FAKE_DATA,
   JSON_SCHEMA_EMPTY_CHOICES_FAKE_DATA,
   JSON_SCHEMA_FIELD_SETS_FAKE_DATA,
   JSON_SCHEMA_ID_$SCHEMA_FAKE_DATA,
@@ -39,9 +40,9 @@ describe("JSON Schema validation", () => {
 
   it("Validate empty choices", () => {
     const validSchema = validateJSONSchema(JSON_SCHEMA_EMPTY_CHOICES_FAKE_DATA).toString;
-    expect(validSchema).not.toContain(/\"enum\"\n*\s*\:\n*\s*\[\n*\s*\]/g);
-    expect(validSchema).not.toContain(/\"enumNames\"\n*\s*\:\n*\s*\{\n*\s*\}/g);
-    expect(validSchema).not.toContain(/\"titleMap\"\n*\s*\:\n*\s*\[\n*\s*\]/g);
+    expect(validSchema).not.toContain(/"enum"\n*\s*:\n*\s*\[\n*\s*\]/g);
+    expect(validSchema).not.toContain(/"enumNames"\n*\s*:\n*\s*\{\n*\s*\}/g);
+    expect(validSchema).not.toContain(/"titleMap"\n*\s*:\n*\s*\[\n*\s*\]/g);
   });
 
   it("Validate remove $schema and id properties", () => {
@@ -88,7 +89,11 @@ describe("JSON Schema validation", () => {
   });
 
   it('Validate duplicated items in single select',  () => {
-    expect(() => validateJSONSchema(JSON_SCHEMA_DUPLICATED_CHOICES_SINGLE_SELECT_FAKE_DATA)).toThrow('Duplicated items');
+    expect(() => validateJSONSchema(JSON_SCHEMA_DUPLICATED_CHOICES_SINGLE_SELECT_FAKE_DATA)).toThrow('Duplicated enum items');
+  });
+
+  it('Validate duplicated required properties',  () => {
+    expect(() => validateJSONSchema(JSON_SCHEMA_DUPLICATED_REQUIRED_PROPERTIES_FAKE_DATA)).toThrow('Duplicated required properties');
   });
 
   it("Format schema definition location", () => {