# Error Duplicate record found in rrset: example.tld when modifying a zone

## Symptoms

The following error is thrown when modifying a DNS zone:

```
Error TTL mismatch in rrset: example.tld
```

## Cause

A given record appears twice in the zone. For example:

```
example.tld A 1.2.3.4<br></br>example.tld A 1.2.3.4
```

## Resolution

Remove duplicate records.