Exchange 2013 cu6 Schema update failed

I am trying to install Exchange 2013 on server 2012 r2. AD level is 2012 r2 and I currently have exchange 2010 sp3 with all the rollups running. DCdiag passes with no errors.

The setup fails at the first step which is schema and AD preparation with the following error.

Error:
The following error was generated when "$error.Clear();
	install-ExchangeSchema -LdapFileName ($roleInstallPath + "Setup\Data\"+$RoleSchemaPrefix + "schema85.ldf")" was run: "Microsoft.Exchange.Configuration.Tasks.TaskException: There was an error while running 'ldifde.exe' to import the schema file 'C:\Windows\Temp\ExchangeSetup\Setup\Data\PostExchange2003_schema85.ldf'. The error code is: 8245. More details can be found in the error file: 'C:\Users\hhemmati\AppData\Local\Temp\ldif.err'
   at Microsoft.Exchange.Configuration.Tasks.Task.ThrowError(Exception exception, ErrorCategory errorCategory, Object target, String helpUrl)
   at Microsoft.Exchange.Management.Deployment.InstallExchangeSchema.ImportSchemaFile(String schemaMasterServer, String schemaFilePath, String macroName, String macroValue, WriteVerboseDelegate writeVerbose)
   at Microsoft.Exchange.Management.Deployment.InstallExchangeSchema.InternalProcessRecord()
   at Microsoft.Exchange.Configuration.Tasks.Task.<ProcessRecord>b__b()
   at Microsoft.Exchange.Configuration.Tasks.Task.InvokeRetryableFunc(String funcName, Action func, Boolean terminatePipelineIfFailed)".

The file ldiff.err contains the following

Entry DN: CN=ms-DS-GeoCoordinates-Altitude,CN=Schema,CN=Configuration,DC=palatribe,DC=com
Add error on entry starting on line 134: Unwilling To Perform

The server side error is: 0x20bb Schema update failed: duplicate OID.

The extended server error is:

000020BB: SvcErr: DSID-032603C0, problem 5003 (WILL_NOT_PERFORM), data 8379


An error has occurred in the program