---
title: Cannot mark ‘Phone’ lead field unique
description: "Issue: Unable to mark 'Phone' lead field as unique for some Leadsquared accounts. Reason:  1. Could be possible there are duplicate leads in the account. 2. Due to different phone number formatting, the duplicate entries are present in the database ..."
url: "https://supportb.kinsta.cloud/docs/cannot-mark-phone-lead-field-unique/"
updated: "2020-07-13"
category: Leads Settings
---

# Cannot mark ‘Phone’ lead field unique

**Issue: **Unable to **mark 'Phone' lead field as unique** for some Leadsquared accounts.

![](https://desk.zoho.in/DocsDisplay?zgId=60004478432&mode=inline&blockId=dn89w46b429ad874044e8aaaafde5e93980f3)

**Reason**: 

1. Could be possible there are **duplicate leads** in the account.

2. Due to different **phone number formatting**, the duplicate entries are present in the database even after merging them on the UI.

**Solution:**

1. Identify if the duplicate entries or leads are present in the system with the help of the **report** ["List of Duplicate Leads"](https://run.leadsquared.com/Reports/Viewer?id=800&type=1&categoryName=Administrative%20Reports), in case present, merge them and try marking the field as unique.

2. In case the first method doesn't work, then it is required to contact the **DEVELOPMENT team **to have this issue resolved from the back-end.

**NOTE: **Make sure you involve the 'Success engineer' in case you are contacting DEV team for the resolution as it may incur extra charges.