diff --git a/lib/model/query/datasets.js b/lib/model/query/datasets.js
index ccf8f7330..be50cbf9b 100644
--- a/lib/model/query/datasets.js
+++ b/lib/model/query/datasets.js
@@ -143,8 +143,9 @@ const createOrMerge = (parsedDataset, form, fields) => async ({ context, one, Ac
 
     // Check properties with same name but different capitualization
     const duplicateProperties = newNames
+      .filter(newName => !existingNames.includes(newName))
       .map(newName => ({
-        current: existingNames.find(existingName => existingName !== newName && newName.toLowerCase() === existingName.toLowerCase()),
+        current: existingNames.find(existingName => newName.toLowerCase() === existingName.toLowerCase()),
         provided: newName
       }))
       .filter(property => property.current);
@@ -290,6 +291,7 @@ const publishIfExists = (formDefId, publishedAt) => async ({ all, context, maybe
       AND dp.name != existing_properties.name
     WHERE dpf."formDefId" = ${formDefId}
       AND existing_properties."publishedAt" IS NOT NULL
+      AND dp."publishedAt" IS NULL
   `;
 
   const d = await maybeOne(_datasetNameConflict());
diff --git a/test/integration/api/datasets.js b/test/integration/api/datasets.js
index f97d96676..838385fce 100644
--- a/test/integration/api/datasets.js
+++ b/test/integration/api/datasets.js
@@ -4063,6 +4063,23 @@ describe('datasets and entities', () => {
             });
 
         }));
+
+        it('should reject when publishing duplicate property with different capitalization', testService(async (service, container) => {
+          const alice = await service.login('alice');
+
+          await alice.post('/v1/projects/1/forms?publish=True')
+            .send(testData.forms.simpleEntity)
+            .set('Content-Type', 'application/xml')
+            .expect(200);
+
+          await container.run(sql`UPDATE ds_properties SET name='FIRST_NAME' WHERE name='age'`);
+
+          await alice.post('/v1/projects/1/forms/simpleEntity/draft')
+            .expect(200);
+
+          await alice.post('/v1/projects/1/forms/simpleEntity/draft/publish?version=v2')
+            .expect(200);
+        }));
       });
 
       describe('updating datasets through new form drafts', () => {