Error after upgrade

[Al]

Hi

I have not looked at my references or webconfig for a few years but after upgrading from

"

2009.2.826.35" to 2012.3.1308.35
I get
Could not load file or assembly 'Telerik.Web.UI, Version=2009.1.311.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

This error rings a bell from my last upgrade but I bamboozled by the size and complexity of my webconfig and reference section.
For some reason i have this in the<dependentAssembly>

 

<

 

assemblyIdentity name="Telerik.Web.UI" publicKeyToken="121FAE78165BA3D4" culture="neutral" />

 

<

 

bindingRedirect oldVersion="0.0.0.0-2009.2.826.35" newVersion="2009.2.826.35" />

 

</

 

dependentAssembly>

It  my no longer be needed
Any help please

 

[Al]

I am an idiot the reference is in my masterpage